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anatole pushed a commit to branch master
in repository 
https://gitbox.apache.org/repos/asf/incubator-tamaya-extensions.git

commit 6c9a9ff27a859d6f8d528616f229ce957506d31e
Author: Anatole Tresch <[email protected]>
AuthorDate: Sun Feb 24 19:59:36 2019 +0100

    Fixed some checkstyle issues.
---
 .../tamaya/collections/CollectionConverter.java    |   3 +
 .../org/apache/tamaya/etcd/EtcdBackendConfig.java  |  36 ++---
 .../org/apache/tamaya/json/JSONPropertySource.java |   1 -
 .../java/org/apache/tamaya/yaml/YAMLFormat.java    |  21 ++-
 .../apache/tamaya/cdi/ConfigurationProducer.java   |  15 ++-
 .../tamaya/cdi/TamayaCDIInjectionExtension.java    |  20 ++-
 .../inject/internal/DefaultDynamicValue.java       |  22 +--
 .../tamaya/microprofile/MicroprofileConfig.java    |  26 ++--
 .../microprofile/MicroprofileConfigBuilder.java    |  73 +++++-----
 .../MicroprofileConfigProviderResolver.java        |  12 +-
 .../tamaya/microprofile/MicroprofileConverter.java |   1 +
 .../tamaya/microprofile/TamayaConfiguration.java   |   4 +-
 .../microprofile/TamayaPropertyConverter.java      |   1 +
 .../microprofile/cdi/BridgingConfigBean.java       |   4 +-
 .../tamaya/microprofile/cdi/ConfiguredType.java    |  11 +-
 .../cdi/MicroprofileConfigurationProducer.java     |  42 +++---
 .../microprofile/converter/ProviderConverter.java  |  36 +++--
 .../MutablePropertiesPropertySource.java           |  31 +++--
 .../MutableXmlPropertiesPropertySource.java        |  34 +++--
 .../java/org/apache/tamaya/osgi/Activator.java     |   5 +-
 .../main/java/org/apache/tamaya/osgi/Backups.java  |  50 ++++---
 .../java/org/apache/tamaya/osgi/ConfigChanger.java |  20 +--
 .../java/org/apache/tamaya/osgi/ConfigHistory.java | 112 ++++++++++------
 .../org/apache/tamaya/osgi/TamayaConfigPlugin.java | 149 +++++++++++----------
 .../apache/tamaya/gogo/shell/BackupCommands.java   |   3 +
 .../apache/tamaya/gogo/shell/ConfigCommands.java   |   3 +
 .../apache/tamaya/gogo/shell/HistoryCommands.java  |   3 +
 .../apache/tamaya/gogo/shell/SettingsCommands.java |   3 +
 .../apache/tamaya/osgi/injection/Activator.java    |   9 +-
 .../karaf/shell/ApplyTamayaConfigCommand.java      |   3 +
 .../tamaya/karaf/shell/BackupCreateCommand.java    |   3 +
 .../tamaya/karaf/shell/BackupDeleteCommand.java    |   3 +
 .../tamaya/karaf/shell/BackupListCommand.java      |   3 +
 .../tamaya/karaf/shell/BackupRestoreCommand.java   |   3 +
 .../tamaya/karaf/shell/DefaultEnableCommand.java   |   6 +
 .../tamaya/karaf/shell/DefaultEnabledCommand.java  |   3 +
 .../tamaya/karaf/shell/GetPolicyCommand.java       |   3 +
 .../karaf/shell/HistoryDeleteAllCommand.java       |   3 +
 .../tamaya/karaf/shell/HistoryDeleteCommand.java   |   7 +-
 .../tamaya/karaf/shell/HistoryGetCommand.java      |  12 +-
 .../tamaya/karaf/shell/HistoryMaxsizeCommand.java  |   6 +-
 .../karaf/shell/HistoryMaxsizeSetCommand.java      |   3 +
 .../org/apache/tamaya/karaf/shell/InfoCommand.java |   3 +
 .../tamaya/karaf/shell/OSGIConfigCommand.java      |   3 +
 .../tamaya/karaf/shell/PolicyGetCommand.java       |   3 +
 .../tamaya/karaf/shell/PolicySetCommand.java       |   6 +
 .../karaf/shell/PropagateUpdatesCommand.java       |   3 +
 .../karaf/shell/PropagateUpdatesSetCommand.java    |   3 +
 .../tamaya/karaf/shell/PropertyGetCommand.java     |   3 +
 .../tamaya/karaf/shell/PropertySourceCommand.java  |   3 +
 .../tamaya/karaf/shell/PropertySourcesCommand.java |   3 +
 .../tamaya/karaf/shell/TamayaConfigCommand.java    |   3 +
 .../org/apache/tamaya/osgi/updater/Activator.java  |   4 +-
 .../apache/tamaya/osgi/updater/EventListener.java  |   3 +-
 54 files changed, 528 insertions(+), 320 deletions(-)

diff --git 
a/modules/collections/src/main/java/org/apache/tamaya/collections/CollectionConverter.java
 
b/modules/collections/src/main/java/org/apache/tamaya/collections/CollectionConverter.java
index 577cece..a0180f6 100644
--- 
a/modules/collections/src/main/java/org/apache/tamaya/collections/CollectionConverter.java
+++ 
b/modules/collections/src/main/java/org/apache/tamaya/collections/CollectionConverter.java
@@ -36,6 +36,9 @@ public final class CollectionConverter implements 
PropertyConverter<Collection>
     private static final Logger LOG = 
Logger.getLogger(CollectionConverter.class.getName());
     public static final String VALUE_MAPPING = "collection-mapping";
 
+    /**
+     * Type of collection mappings supported.
+     */
     private enum MappingType{
         /** The list values are identiified by parsing the node value(s) into 
items.
          * Hereby only the items of the most significant config entry are 
considered. */
diff --git 
a/modules/etcd/src/main/java/org/apache/tamaya/etcd/EtcdBackendConfig.java 
b/modules/etcd/src/main/java/org/apache/tamaya/etcd/EtcdBackendConfig.java
index 95561c9..696f187 100644
--- a/modules/etcd/src/main/java/org/apache/tamaya/etcd/EtcdBackendConfig.java
+++ b/modules/etcd/src/main/java/org/apache/tamaya/etcd/EtcdBackendConfig.java
@@ -29,24 +29,26 @@ import java.util.logging.Logger;
  */
 final class EtcdBackendConfig {
 
-       private static final Logger LOG = 
Logger.getLogger(EtcdBackendConfig.class.getName());
-       private static final String TAMAYA_ETCD_SERVER_URLS = 
"tamaya.etcd.server";
-       private static final String TAMAYA_ETCD_TIMEOUT = "tamaya.etcd.timeout";
+    private static final Logger LOG = 
Logger.getLogger(EtcdBackendConfig.class.getName());
+    private static final String TAMAYA_ETCD_SERVER_URLS = "tamaya.etcd.server";
+    private static final String TAMAYA_ETCD_TIMEOUT = "tamaya.etcd.timeout";
     private static final String TAMAYA_ETCD_DIRECTORY = 
"tamaya.etcd.directory";
 
 
-    private EtcdBackendConfig(){}
+    private EtcdBackendConfig() {
+    }
 
     /**
      * Get the default etcd directory selector, default {@code ""}.
+     *
      * @return the default etcd directory selector, never null.
      */
-    public static String getEtcdDirectory(){
+    public static String getEtcdDirectory() {
         String val = System.getProperty(TAMAYA_ETCD_DIRECTORY);
-        if(val == null){
+        if (val == null) {
             val = System.getenv(TAMAYA_ETCD_DIRECTORY);
         }
-        if(val!=null){
+        if (val != null) {
             return val;
         }
         return "";
@@ -55,14 +57,15 @@ final class EtcdBackendConfig {
     /**
      * Get the etcd connection timeout from system/enfironment property {@code 
tamaya.etcd.timeout (=seconds)}
      * (default 2 seconds).
+     *
      * @return the etcd connection timeout.
      */
-    public static long getEtcdTimeout(){
+    public static long getEtcdTimeout() {
         String val = System.getProperty(TAMAYA_ETCD_TIMEOUT);
-        if(val == null){
+        if (val == null) {
             val = System.getenv(TAMAYA_ETCD_TIMEOUT);
         }
-        if(val!=null){
+        if (val != null) {
             return TimeUnit.MILLISECONDS.convert(Integer.parseInt(val), 
TimeUnit.SECONDS);
         }
         return 2000L;
@@ -70,22 +73,23 @@ final class EtcdBackendConfig {
 
     /**
      * Evaluate the etcd target servers fomr system/environment property 
{@code tamaya.etcd.server}.
+     *
      * @return the servers configured, or {@code http://127.0.0.1:4001} 
(default).
      */
-    public static List<String> getServers(){
+    public static List<String> getServers() {
         String serverURLs = System.getProperty(TAMAYA_ETCD_SERVER_URLS);
-        if(serverURLs==null){
+        if (serverURLs == null) {
             serverURLs = System.getenv(TAMAYA_ETCD_SERVER_URLS);
         }
-        if(serverURLs==null){
+        if (serverURLs == null) {
             serverURLs = "http://127.0.0.1:4001";;
         }
         List<String> servers = new ArrayList<>();
-        for(String url:serverURLs.split("\\,")) {
-            try{
+        for (String url : serverURLs.split("\\,")) {
+            try {
                 servers.add(url.trim());
                 LOG.info("Using etcd endoint: " + url);
-            } catch(Exception e){
+            } catch (Exception e) {
                 LOG.log(Level.SEVERE, "Error initializing etcd accessor for 
URL: " + url, e);
             }
         }
diff --git 
a/modules/formats/json/src/main/java/org/apache/tamaya/json/JSONPropertySource.java
 
b/modules/formats/json/src/main/java/org/apache/tamaya/json/JSONPropertySource.java
index bc982ef..39f2b95 100644
--- 
a/modules/formats/json/src/main/java/org/apache/tamaya/json/JSONPropertySource.java
+++ 
b/modules/formats/json/src/main/java/org/apache/tamaya/json/JSONPropertySource.java
@@ -25,7 +25,6 @@ import org.apache.tamaya.spi.PropertyValue;
 import java.io.IOException;
 import java.io.InputStream;
 import java.net.URL;
-import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
 import java.util.Collections;
 import java.util.HashMap;
diff --git 
a/modules/formats/yaml/src/main/java/org/apache/tamaya/yaml/YAMLFormat.java 
b/modules/formats/yaml/src/main/java/org/apache/tamaya/yaml/YAMLFormat.java
index f7d8102..c1b6038 100644
--- a/modules/formats/yaml/src/main/java/org/apache/tamaya/yaml/YAMLFormat.java
+++ b/modules/formats/yaml/src/main/java/org/apache/tamaya/yaml/YAMLFormat.java
@@ -61,35 +61,34 @@ public class YAMLFormat implements ConfigurationFormat {
 
     @Override
     public ConfigurationData readConfiguration(String resource, InputStream 
inputStream) {
-        try{
+        try {
             Yaml yaml = new Yaml();
             PropertyValue data;
             Object config = yaml.load(inputStream);
-            if(config instanceof Map){
+            if (config instanceof Map) {
                 data = PropertyValue.createObject("");
                 data.setMeta("resource", resource);
                 data.setMeta("format", "yaml");
-                addObject((Map)config, (ObjectValue)data);
-            }else if(config instanceof List){
+                addObject((Map) config, (ObjectValue) data);
+            } else if (config instanceof List) {
                 data = PropertyValue.createList("");
                 data.setMeta("resource", resource);
                 data.setMeta("format", "yaml");
-                addList((List)config, (ListValue)data);
-            }else {
+                addList((List) config, (ListValue) data);
+            } else {
                 throw new ConfigException("Unknown YamlType encountered: " + 
config.getClass().getName());
             }
-            if(LOG.isLoggable(Level.FINEST)){
+            if (LOG.isLoggable(Level.FINEST)) {
                 LOG.finest(String.format("Read data from %s : %s", resource, 
data.asString()));
             }
             return new ConfigurationData(resource, this, data);
-        }
-        catch (Throwable t) {
+        } catch (Throwable t) {
             throw new ConfigException(format("Failed to read properties from 
%s", resource), t);
         }
     }
 
 
-    private void addObject(Map<String,Object> values, ObjectValue dataNode){
+    private void addObject(Map<String, Object> values, ObjectValue dataNode) {
         values.forEach((key, value) -> {
             if (value instanceof List) {
                 ListValue list = dataNode.setList(key);
@@ -115,7 +114,7 @@ public class YAMLFormat implements ConfigurationFormat {
             } else if (val instanceof Map) {
                 ObjectValue ov = dataNode.addObject();
                 addObject((Map) val, ov);
-            } else{
+            } else {
                 dataNode.setValue(String.valueOf(val));
             }
         });
diff --git 
a/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/ConfigurationProducer.java
 
b/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/ConfigurationProducer.java
index a5b5cf8..986b7a4 100644
--- 
a/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/ConfigurationProducer.java
+++ 
b/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/ConfigurationProducer.java
@@ -16,9 +16,18 @@
  */
 package org.apache.tamaya.cdi;
 
-import org.apache.tamaya.*;
-import org.apache.tamaya.inject.api.*;
-import org.apache.tamaya.spi.*;
+import org.apache.tamaya.ConfigException;
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.TypeLiteral;
+import org.apache.tamaya.inject.api.Config;
+import org.apache.tamaya.inject.api.ConfigSection;
+import org.apache.tamaya.inject.api.DynamicValue;
+import org.apache.tamaya.inject.api.WithConfigOperator;
+import org.apache.tamaya.inject.api.WithPropertyConverter;
+import org.apache.tamaya.spi.ConfigurationBuilder;
+import org.apache.tamaya.spi.ConfigurationContext;
+import org.apache.tamaya.spi.ConversionContext;
+import org.apache.tamaya.spi.PropertyConverter;
 
 import javax.enterprise.context.ApplicationScoped;
 import javax.enterprise.inject.Instance;
diff --git 
a/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/TamayaCDIInjectionExtension.java
 
b/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/TamayaCDIInjectionExtension.java
index fbbd3c9..d1b2430 100644
--- 
a/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/TamayaCDIInjectionExtension.java
+++ 
b/modules/injection/cdi/src/main/java/org/apache/tamaya/cdi/TamayaCDIInjectionExtension.java
@@ -28,11 +28,25 @@ import org.apache.tamaya.spi.PropertyConverter;
 import javax.enterprise.context.spi.CreationalContext;
 import javax.enterprise.event.Observes;
 import javax.enterprise.inject.Instance;
-import javax.enterprise.inject.spi.*;
+import javax.enterprise.inject.spi.AfterBeanDiscovery;
+import javax.enterprise.inject.spi.Bean;
+import javax.enterprise.inject.spi.BeanManager;
+import javax.enterprise.inject.spi.Extension;
+import javax.enterprise.inject.spi.InjectionPoint;
+import javax.enterprise.inject.spi.ProcessBean;
+import javax.enterprise.inject.spi.ProcessProducerMethod;
 import javax.inject.Provider;
 import java.lang.annotation.Annotation;
-import java.lang.reflect.*;
-import java.util.*;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.ListIterator;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.function.UnaryOperator;
 import java.util.logging.Logger;
diff --git 
a/modules/injection/standalone/src/main/java/org/apache/tamaya/inject/internal/DefaultDynamicValue.java
 
b/modules/injection/standalone/src/main/java/org/apache/tamaya/inject/internal/DefaultDynamicValue.java
index f9a16eb..450ed4d 100644
--- 
a/modules/injection/standalone/src/main/java/org/apache/tamaya/inject/internal/DefaultDynamicValue.java
+++ 
b/modules/injection/standalone/src/main/java/org/apache/tamaya/inject/internal/DefaultDynamicValue.java
@@ -84,7 +84,7 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
         this.propertyConverter = propertyConverter;
         this.loadPolicy = Objects.requireNonNull(loadPolicy);
         setUpdatePolicy(updatePolicy);
-        if(loadPolicy == LoadPolicy.INITIAL){
+        if (loadPolicy == LoadPolicy.INITIAL) {
             this.value = evaluateValue();
         }
     }
@@ -101,8 +101,8 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
         return of(owner, annotatedField, configuration, LoadPolicy.ALWAYS, 
updatePolicy);
     }
 
-    @SuppressWarnings({ "rawtypes", "unchecked" })
-       public static DynamicValue<?> of(Object owner, Field annotatedField, 
Configuration configuration,
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    public static DynamicValue<?> of(Object owner, Field annotatedField, 
Configuration configuration,
                                      LoadPolicy loadPolicy, UpdatePolicy 
updatePolicy) {
         // Check for adapter/filter
         Type targetType = annotatedField.getGenericType();
@@ -148,7 +148,7 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
     }
 
     @SuppressWarnings("unchecked")
-       public static DynamicValue<?> of(Object owner, Method method, 
Configuration configuration,
+    public static DynamicValue<?> of(Object owner, Method method, 
Configuration configuration,
                                      LoadPolicy loadPolicy, UpdatePolicy 
updatePolicy) {
         // Check for adapter/filter
         Type targetType = method.getGenericReturnType();
@@ -181,7 +181,7 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
                 loadPolicy, updatePolicy);
     }
 
-    protected PropertyConverter getCustomConverter(){
+    protected PropertyConverter getCustomConverter() {
         return this.propertyConverter;
     }
 
@@ -195,13 +195,13 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
      */
     public T get() {
         T newLocalValue;
-        if(loadPolicy!=LoadPolicy.INITIAL) {
+        if (loadPolicy != LoadPolicy.INITIAL) {
             newLocalValue = evaluateValue();
             if (this.value == null) {
                 this.value = newLocalValue;
             }
-            if(!Objects.equals(this.value, newLocalValue)){
-                switch (getUpdatePolicy()){
+            if (!Objects.equals(this.value, newLocalValue)) {
+                switch (getUpdatePolicy()) {
                     case IMMEDEATE:
                     case IMMEDIATE:
                         commit();
@@ -234,7 +234,7 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
      * {@link UpdatePolicy} in place.
      */
     public boolean updateValue() {
-        if(this.value==null && this.newValue==null){
+        if (this.value == null && this.newValue == null) {
             this.value = evaluateValue();
             return false;
         }
@@ -290,8 +290,8 @@ final class DefaultDynamicValue<T> extends 
BaseDynamicValue<T> {
      * @throws IOException
      */
     @SuppressWarnings("unchecked")
-       private void readObject(ObjectInputStream ois) throws IOException, 
ClassNotFoundException {
-        setUpdatePolicy((UpdatePolicy)ois.readObject());
+    private void readObject(ObjectInputStream ois) throws IOException, 
ClassNotFoundException {
+        setUpdatePolicy((UpdatePolicy) ois.readObject());
         if (isPresent()) {
             this.value = (T) ois.readObject();
         }
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfig.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfig.java
index c38d38f..a351a7d 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfig.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfig.java
@@ -35,14 +35,14 @@ import java.util.*;
  */
 public class MicroprofileConfig implements Config, Serializable {
 
-       private static final long serialVersionUID = -2811635734899431816L;
-       private Configuration delegate;
+    private static final long serialVersionUID = -2811635734899431816L;
+    private Configuration delegate;
 
-    public MicroprofileConfig(Configuration delegate){
+    public MicroprofileConfig(Configuration delegate) {
         this.delegate = Objects.requireNonNull(delegate);
     }
 
-    public Configuration getConfiguration(){
+    public Configuration getConfiguration() {
         return this.delegate;
     }
 
@@ -50,14 +50,14 @@ public class MicroprofileConfig implements Config, 
Serializable {
     @Override
     public <T> T getValue(String propertyName, Class<T> propertyType) {
         T value = null;
-        try{
+        try {
             value = delegate.get(propertyName, propertyType);
-        }catch(ConfigException e){
-            if(e.toString().contains("Unparseable")){
+        } catch (ConfigException e) {
+            if (e.toString().contains("Unparseable")) {
                 throw new IllegalArgumentException("Invalid type: " + 
propertyType.getName());
             }
         }
-        if(value == null){
+        if (value == null) {
             throw new NoSuchElementException("No such config property: " + 
propertyName);
         }
         return value;
@@ -85,16 +85,16 @@ public class MicroprofileConfig implements Config, 
Serializable {
                 '}';
     }
 
-    private void writeObject(ObjectOutputStream out) throws IOException{
-        if(!(this.delegate instanceof Serializable)){
+    private void writeObject(ObjectOutputStream out) throws IOException {
+        if (!(this.delegate instanceof Serializable)) {
             out.writeObject(this.delegate.getSnapshot());
-        }else {
+        } else {
             out.writeObject(this.delegate);
         }
     }
 
-    private void readObject(ObjectInputStream in) throws IOException, 
ClassNotFoundException{
-        this.delegate = (Configuration)in.readObject();
+    private void readObject(ObjectInputStream in) throws IOException, 
ClassNotFoundException {
+        this.delegate = (Configuration) in.readObject();
     }
 
 }
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigBuilder.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigBuilder.java
index 816878c..419829b 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigBuilder.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigBuilder.java
@@ -37,15 +37,16 @@ import org.eclipse.microprofile.config.spi.Converter;
  * Created by atsticks on 23.03.17.
  */
 final class MicroprofileConfigBuilder implements ConfigBuilder {
-       
-       private ConfigurationBuilder configurationBuilder;
 
-    MicroprofileConfigBuilder(ConfigurationBuilder configurationBuilder){
+    private ConfigurationBuilder configurationBuilder;
+
+    MicroprofileConfigBuilder(ConfigurationBuilder configurationBuilder) {
         this.configurationBuilder = 
Objects.requireNonNull(configurationBuilder);
         configurationBuilder.addDefaultPropertyConverters();
     }
+
     public ConfigurationBuilder getConfigurationBuilder() {
-       return configurationBuilder;
+        return configurationBuilder;
     }
 
     /**
@@ -61,31 +62,32 @@ final class MicroprofileConfigBuilder implements 
ConfigBuilder {
      */
     @Override
     public ConfigBuilder addDefaultSources() {
-       
-       configurationBuilder.addPropertySources(
+
+        configurationBuilder.addPropertySources(
                 new SystemPropertySource(400), //
                 new EnvironmentPropertySource(300), //
                 new MicroprofileDefaultProperties() //
-                                               );
-       
configurationBuilder.sortPropertySources(PropertySourceComparator.getInstance());
+        );
+        
configurationBuilder.sortPropertySources(PropertySourceComparator.getInstance());
         return this;
     }
 
     /**
      * Add ConfigSources registered using the ServiceLoader.
+     *
      * @return the ConfigBuilder with the added configuration sources
      */
     @Override
     public ConfigBuilder addDiscoveredSources() {
-        for(ConfigSource configSource: ServiceContextManager.getServiceContext(
-                
configurationBuilder.getClassLoader()).getServices(ConfigSource.class)){
-               
configurationBuilder.addPropertySources(MicroprofileAdapter.toPropertySource(configSource));
+        for (ConfigSource configSource : 
ServiceContextManager.getServiceContext(
+                
configurationBuilder.getClassLoader()).getServices(ConfigSource.class)) {
+            
configurationBuilder.addPropertySources(MicroprofileAdapter.toPropertySource(configSource));
         }
 
-        for(ConfigSourceProvider configSourceProvider: 
ServiceContextManager.getServiceContext(
+        for (ConfigSourceProvider configSourceProvider : 
ServiceContextManager.getServiceContext(
                 configurationBuilder.getClassLoader()
-        ).getServices(ConfigSourceProvider.class)){
-               
configurationBuilder.addPropertySources(MicroprofileAdapter.toPropertySources(configSourceProvider.getConfigSources(
+        ).getServices(ConfigSourceProvider.class)) {
+            
configurationBuilder.addPropertySources(MicroprofileAdapter.toPropertySources(configSourceProvider.getConfigSources(
                     Thread.currentThread().getContextClassLoader()
             )));
         }
@@ -95,17 +97,18 @@ final class MicroprofileConfigBuilder implements 
ConfigBuilder {
 
     /**
      * Add Converters registered using the ServiceLoader.
+     *
      * @return the ConfigBuilder with the added configuration converters
      */
-    @SuppressWarnings({ "unchecked", "rawtypes" })
-       @Override
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    @Override
     public ConfigBuilder addDiscoveredConverters() {
-        for(Converter<?> converter: ServiceContextManager.getServiceContext(
+        for (Converter<?> converter : ServiceContextManager.getServiceContext(
                 configurationBuilder.getClassLoader()
-        ).getServices(Converter.class)){
-                       TypeLiteral targetType = TypeLiteral.of(
-                    
TypeLiteral.getGenericInterfaceTypeParameters(converter.getClass(),Converter.class)[0]);
-            
+        ).getServices(Converter.class)) {
+            TypeLiteral targetType = TypeLiteral.of(
+                    
TypeLiteral.getGenericInterfaceTypeParameters(converter.getClass(), 
Converter.class)[0]);
+
             configurationBuilder.addPropertyConverters(targetType,
                     MicroprofileAdapter.toPropertyConverter(converter));
         }
@@ -120,19 +123,19 @@ final class MicroprofileConfigBuilder implements 
ConfigBuilder {
 
     @Override
     public ConfigBuilder withSources(ConfigSource... sources) {
-        for(ConfigSource source:sources){
+        for (ConfigSource source : sources) {
             
configurationBuilder.addPropertySources(MicroprofileAdapter.toPropertySource(source));
         }
         return this;
     }
 
-    @SuppressWarnings({ "rawtypes", "unchecked" })
-       @Override
+    @SuppressWarnings({"rawtypes", "unchecked"})
+    @Override
     public ConfigBuilder withConverters(Converter<?>... converters) {
-        for(Converter<?> converter:converters){
+        for (Converter<?> converter : converters) {
             TypeLiteral lit = TypeLiteral.of(converter.getClass());
             TypeLiteral target = TypeLiteral.of(lit.getType());
-            
+
             configurationBuilder.removePropertyConverters(target);
             configurationBuilder.addPropertyConverters(target,
                     MicroprofileAdapter.toPropertyConverter(converter));
@@ -140,18 +143,18 @@ final class MicroprofileConfigBuilder implements 
ConfigBuilder {
         return this;
     }
 
-       @SuppressWarnings("unchecked")
-       @Override
-       public <T> ConfigBuilder withConverter(Class<T> type, int priority, 
Converter<T> converter) {
-               
configurationBuilder.addPropertyConverters(TypeLiteral.of(type), 
MicroprofileAdapter.toPropertyConverter(converter));
-               return this;
-       }
-    
+    @SuppressWarnings("unchecked")
+    @Override
+    public <T> ConfigBuilder withConverter(Class<T> type, int priority, 
Converter<T> converter) {
+        configurationBuilder.addPropertyConverters(TypeLiteral.of(type), 
MicroprofileAdapter.toPropertyConverter(converter));
+        return this;
+    }
+
     @Override
     public Config build() {
         Configuration config = getConfigurationBuilder().build();
-       Configuration.setCurrent(config);
-       
+        Configuration.setCurrent(config);
+
         return MicroprofileAdapter.toConfig(config);
     }
 
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigProviderResolver.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigProviderResolver.java
index 33da10a..ac92aa6 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigProviderResolver.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConfigProviderResolver.java
@@ -43,9 +43,9 @@ public class MicroprofileConfigProviderResolver extends 
ConfigProviderResolver {
     @Override
     public Config getConfig(ClassLoader loader) {
         Config config = this.configs.get(loader);
-        if(config==null){
-               ConfigurationBuilder builder = 
Configuration.createConfigurationBuilder();
-               builder.setClassLoader(loader);
+        if (config == null) {
+            ConfigurationBuilder builder = 
Configuration.createConfigurationBuilder();
+            builder.setClassLoader(loader);
             builder.addDefaultPropertyConverters();
             MicroprofileConfigBuilder microConfigBuilder = new 
MicroprofileConfigBuilder(builder);
             microConfigBuilder.addDefaultSources();
@@ -63,7 +63,7 @@ public class MicroprofileConfigProviderResolver extends 
ConfigProviderResolver {
 
     @Override
     public void registerConfig(Config config, ClassLoader classLoader) {
-        if(configs.containsKey(classLoader)){
+        if (configs.containsKey(classLoader)) {
             Logger.getLogger(getClass().getName())
                     .warning("Replacing existing config for classloader: " + 
classLoader);
 //            throw new IllegalArgumentException("Already a config registered 
with classloader: " + classLoader);
@@ -73,8 +73,8 @@ public class MicroprofileConfigProviderResolver extends 
ConfigProviderResolver {
 
     @Override
     public void releaseConfig(Config config) {
-        for(Map.Entry<ClassLoader, Config> en: this.configs.entrySet()){
-            if(en.getValue().equals(config)){
+        for (Map.Entry<ClassLoader, Config> en : this.configs.entrySet()) {
+            if (en.getValue().equals(config)) {
                 this.configs.remove(en.getKey());
                 return;
             }
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConverter.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConverter.java
index e1ac08d..b351d80 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConverter.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/MicroprofileConverter.java
@@ -29,6 +29,7 @@ import java.util.Objects;
 
 /**
  * Property source implementation that wraps a Microprofile {@link 
ConfigSource} instance.
+ * @param <T> the target type.
  */
 public class MicroprofileConverter<T> implements Converter<T> {
 
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaConfiguration.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaConfiguration.java
index 469deba..cfc0ead 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaConfiguration.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaConfiguration.java
@@ -18,7 +18,9 @@
  */
 package org.apache.tamaya.microprofile;
 
-import org.apache.tamaya.*;
+import org.apache.tamaya.Configuration;
+import org.apache.tamaya.ConfigurationSnapshot;
+import org.apache.tamaya.TypeLiteral;
 import org.apache.tamaya.spi.ConfigurationContext;
 import org.apache.tamaya.spisupport.DefaultConfigurationSnapshot;
 import org.eclipse.microprofile.config.Config;
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaPropertyConverter.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaPropertyConverter.java
index a83008a..a5088d4 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaPropertyConverter.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/TamayaPropertyConverter.java
@@ -28,6 +28,7 @@ import java.util.Objects;
 
 /**
  * Property source implementation that wraps a Microprofile {@link 
ConfigSource} instance.
+ * @param <T> the target type.
  */
 public class TamayaPropertyConverter<T> implements PropertyConverter<T> {
 
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/BridgingConfigBean.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/BridgingConfigBean.java
index e6f90c8..ae8f883 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/BridgingConfigBean.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/BridgingConfigBean.java
@@ -32,8 +32,8 @@ final class BridgingConfigBean implements Bean<Object> {
     private final Bean<Object> delegate;
     private final Set<Type> types;
 
-    @SuppressWarnings({ "unchecked", "rawtypes" })
-       public BridgingConfigBean(final Bean delegate, final Set<Type> types) {
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    public BridgingConfigBean(final Bean delegate, final Set<Type> types) {
         this.types = types;
         this.delegate = Objects.requireNonNull(delegate);
     }
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/ConfiguredType.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/ConfiguredType.java
index 92b535e..fb13911 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/ConfiguredType.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/ConfiguredType.java
@@ -37,12 +37,12 @@ public final class ConfiguredType {
     private final List<ConfiguredMethod> methods = new ArrayList<>();
     private final List<ConfiguredField> fields = new ArrayList<>();
 
-    public ConfiguredType(Class<?> type){
+    public ConfiguredType(Class<?> type) {
         this.type = Objects.requireNonNull(type);
     }
 
     @SuppressWarnings("rawtypes")
-       public Class getType() {
+    public Class getType() {
         return type;
     }
 
@@ -64,14 +64,15 @@ public final class ConfiguredType {
 
     /**
      * Used to build up during injection point processing.
+     *
      * @param injectionPoint the CDI injection point, not null.
-     * @param key the possible configuration key, not null.
+     * @param key            the possible configuration key, not null.
      */
     void addConfiguredMember(InjectionPoint injectionPoint, String key) {
         Member member = injectionPoint.getMember();
-        if(member instanceof Field){
+        if (member instanceof Field) {
             this.fields.add(new ConfiguredField(injectionPoint, key));
-        } else if(member instanceof Method){
+        } else if (member instanceof Method) {
             this.methods.add(new ConfiguredMethod(injectionPoint, key));
         }
     }
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/MicroprofileConfigurationProducer.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/MicroprofileConfigurationProducer.java
index e3afea5..cca7f26 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/MicroprofileConfigurationProducer.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/cdi/MicroprofileConfigurationProducer.java
@@ -52,10 +52,10 @@ public class MicroprofileConfigurationProducer {
     @Produces
     @ConfigProperty
     public Object resolveAndConvert(final InjectionPoint injectionPoint) {
-        LOGGER.finest( () -> "Inject: " + injectionPoint);
+        LOGGER.finest(() -> "Inject: " + injectionPoint);
         final ConfigProperty annotation = 
injectionPoint.getAnnotated().getAnnotation(ConfigProperty.class);
         String key = annotation.name();
-        if(key.isEmpty()){
+        if (key.isEmpty()) {
             key = getDefaultKey(injectionPoint);
         }
 
@@ -75,7 +75,7 @@ public class MicroprofileConfigurationProducer {
     }
 
     @SuppressWarnings("rawtypes")
-       static String getDefaultKey(InjectionPoint injectionPoint) {
+    static String getDefaultKey(InjectionPoint injectionPoint) {
         Class declaringType = injectionPoint.getMember().getDeclaringClass();
         return declaringType.getCanonicalName() + "." + 
injectionPoint.getMember().getName();
     }
@@ -85,24 +85,24 @@ public class MicroprofileConfigurationProducer {
         Configuration config = Configuration.current();
         ConversionContext.Builder builder = new 
ConversionContext.Builder(config,
                 key, TypeLiteral.of(targetType));
-        if(targetType instanceof ParameterizedType){
-            ParameterizedType pt = (ParameterizedType)targetType;
-            if(pt.getRawType().equals(Provider.class)) {
+        if (targetType instanceof ParameterizedType) {
+            ParameterizedType pt = (ParameterizedType) targetType;
+            if (pt.getRawType().equals(Provider.class)) {
                 builder = new ConversionContext.Builder(config,
                         key, TypeLiteral.of(pt.getActualTypeArguments()[0]));
             }
         }
         if (injectionPoint.getMember() instanceof AnnotatedElement) {
-            AnnotatedElement annotated = 
(AnnotatedElement)injectionPoint.getMember();
-            if(annotated.isAnnotationPresent(ConfigProperty.class)) {
+            AnnotatedElement annotated = (AnnotatedElement) 
injectionPoint.getMember();
+            if (annotated.isAnnotationPresent(ConfigProperty.class)) {
                 builder.setAnnotatedElement(annotated);
             }
-        }else if(injectionPoint.getMember() instanceof Method){
-            Method method = (Method)injectionPoint.getMember();
-            for(Type type:method.getParameterTypes()){
-                if(type instanceof AnnotatedElement){
-                    AnnotatedElement annotated = (AnnotatedElement)type;
-                    if(annotated.isAnnotationPresent(ConfigProperty.class)) {
+        } else if (injectionPoint.getMember() instanceof Method) {
+            Method method = (Method) injectionPoint.getMember();
+            for (Type type : method.getParameterTypes()) {
+                if (type instanceof AnnotatedElement) {
+                    AnnotatedElement annotated = (AnnotatedElement) type;
+                    if (annotated.isAnnotationPresent(ConfigProperty.class)) {
                         builder.setAnnotatedElement(annotated);
                     }
                 }
@@ -111,18 +111,18 @@ public class MicroprofileConfigurationProducer {
         return builder.build();
     }
 
-    @SuppressWarnings({ "rawtypes", "unchecked" })
+    @SuppressWarnings({"rawtypes", "unchecked"})
     static Object resolveValue(String defaultTextValue, ConversionContext 
context, InjectionPoint injectionPoint) {
         Config config = ConfigProviderResolver.instance().getConfig();
         String textValue = config.getOptionalValue(context.getKey(), 
String.class).orElse(defaultTextValue);
-        if(String.class.equals(context.getTargetType().getRawType())){
+        if (String.class.equals(context.getTargetType().getRawType())) {
             return textValue;
         }
         Object value = null;
         if (textValue != null || 
Optional.class.equals(context.getTargetType().getRawType())) {
-            LOGGER.log(Level.FINEST, () -> "Converting KEY: " + 
context.getKey() + "("+context.getTargetType()+"), textValue: " + textValue);
-                       List<PropertyConverter> converters = 
Configuration.current().getContext()
-                    
.getPropertyConverters((TypeLiteral)context.getTargetType());
+            LOGGER.log(Level.FINEST, () -> "Converting KEY: " + 
context.getKey() + "(" + context.getTargetType() + "), textValue: " + 
textValue);
+            List<PropertyConverter> converters = 
Configuration.current().getContext()
+                    .getPropertyConverters((TypeLiteral) 
context.getTargetType());
             for (PropertyConverter<Object> converter : converters) {
                 try {
                     value = converter.convert(textValue, context);
@@ -141,12 +141,12 @@ public class MicroprofileConfigurationProducer {
     }
 
     @Produces
-    public Config getConfiguration(){
+    public Config getConfiguration() {
         return ConfigProvider.getConfig();
     }
 
     @Produces
-    public ConfigBuilder getConfigBuilder(){
+    public ConfigBuilder getConfigBuilder() {
         return ConfigProviderResolver.instance().getBuilder();
     }
 
diff --git 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/converter/ProviderConverter.java
 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/converter/ProviderConverter.java
index f15dd38..6907503 100644
--- 
a/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/converter/ProviderConverter.java
+++ 
b/modules/microprofile/src/main/java/org/apache/tamaya/microprofile/converter/ProviderConverter.java
@@ -34,6 +34,9 @@ import org.apache.tamaya.TypeLiteral;
 import org.apache.tamaya.spi.ConversionContext;
 import org.apache.tamaya.spi.PropertyConverter;
 
+/**
+ * Allows injection of {@link Provider} instances.
+ */
 @SuppressWarnings("rawtypes")
 @Priority(-1)
 public class ProviderConverter implements PropertyConverter<Provider> {
@@ -41,30 +44,35 @@ public class ProviderConverter implements 
PropertyConverter<Provider> {
     private static final Logger LOG = 
Logger.getLogger(ProviderConverter.class.getName());
 
     @SuppressWarnings({"unchecked"})
-       @Override
+    @Override
     public Provider convert(String value, ConversionContext context) {
         return () -> {
-            try{
+            try {
                 Type targetType = context.getTargetType().getType();
-                               ConvertQuery converter = new 
ConvertQuery(value, TypeLiteral.of(targetType));
+                ConvertQuery converter = new ConvertQuery(value, 
TypeLiteral.of(targetType));
                 return context.getConfiguration().adapt(converter);
-            }catch(Exception e){
+            } catch (Exception e) {
                 throw new ConfigException("Error evaluating configuration 
createValue.", e);
             }
         };
     }
 
     @Override
-    public boolean equals(Object o){
+    public boolean equals(Object o) {
         return getClass().equals(o.getClass());
     }
 
     @Override
-    public int hashCode(){
+    public int hashCode() {
         return getClass().hashCode();
     }
 
-    private static final class ConvertQuery<T> implements 
Function<Configuration,T> {
+    /**
+     * Query for getting the sub converter required.
+     *
+     * @param <T> the type.
+     */
+    private static final class ConvertQuery<T> implements 
Function<Configuration, T> {
 
         private String rawValue;
         private TypeLiteral<T> type;
@@ -79,18 +87,18 @@ public class ProviderConverter implements 
PropertyConverter<Provider> {
             List<PropertyConverter<T>> converters = 
config.getContext().getPropertyConverters(type);
             ConversionContext context = new 
ConversionContext.Builder(type).setConfiguration(config)
                     
.setConfiguration(config).setKey(ConvertQuery.class.getName()).build();
-            for(PropertyConverter<?> conv: converters) {
-                try{
-                    if(conv instanceof ProviderConverter){
+            for (PropertyConverter<?> conv : converters) {
+                try {
+                    if (conv instanceof ProviderConverter) {
                         continue;
                     }
                     @SuppressWarnings("unchecked")
-                    T result = (T)conv.convert(rawValue, context);
-                    if(result!=null){
+                    T result = (T) conv.convert(rawValue, context);
+                    if (result != null) {
                         return result;
                     }
-                }catch(Exception e){
-                    LOG.log(Level.FINEST,  e, () -> "Converter "+ conv +" 
failed to convert to " + type);
+                } catch (Exception e) {
+                    LOG.log(Level.FINEST, e, () -> "Converter " + conv + " 
failed to convert to " + type);
                 }
             }
             return null;
diff --git 
a/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutablePropertiesPropertySource.java
 
b/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutablePropertiesPropertySource.java
index 3a0e06b..2c6c66d 100644
--- 
a/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutablePropertiesPropertySource.java
+++ 
b/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutablePropertiesPropertySource.java
@@ -41,7 +41,7 @@ import java.util.logging.Logger;
  * Simple implementation of a mutable {@link 
org.apache.tamaya.spi.PropertySource} for .properties files.
  */
 public class MutablePropertiesPropertySource extends BasePropertySource
-implements MutablePropertySource{
+        implements MutablePropertySource {
 
     /**
      * The logger.
@@ -71,8 +71,8 @@ implements MutablePropertySource{
      * Creates a new Properties based PropertySource based on the given URL.
      *
      * @param propertiesLocation the URL encoded location, not null.
-     * @param defaultOrdinal the default ordinal to be used, when no ordinal 
is provided with the property
-     *                       source's properties.
+     * @param defaultOrdinal     the default ordinal to be used, when no 
ordinal is provided with the property
+     *                           source's properties.
      */
     public MutablePropertiesPropertySource(File propertiesLocation, int 
defaultOrdinal) {
         super(propertiesLocation.toString(), defaultOrdinal);
@@ -87,7 +87,7 @@ implements MutablePropertySource{
 
     @Override
     public PropertyValue get(String key) {
-        Map<String,PropertyValue> properties = getProperties();
+        Map<String, PropertyValue> properties = getProperties();
         return properties.get(key);
     }
 
@@ -118,46 +118,45 @@ implements MutablePropertySource{
 
     @Override
     public void applyChange(ConfigChangeRequest change) {
-        if(change.isEmpty()){
+        if (change.isEmpty()) {
             LOG.info("Nothing to commit for transaction: " + 
change.getTransactionID());
             return;
         }
-        if(!file.exists()){
+        if (!file.exists()) {
             try {
-                if(!file.createNewFile()){
+                if (!file.createNewFile()) {
                     throw new ConfigException("Failed to createObject config 
file " + file);
                 }
             } catch (IOException e) {
                 throw new ConfigException("Failed to createObject config file 
" + file, e);
             }
         }
-        for(Map.Entry<String,String> 
en:change.getAddedProperties().entrySet()){
+        for (Map.Entry<String, String> en : 
change.getAddedProperties().entrySet()) {
             int index = en.getKey().indexOf('?');
-            if(index>0){
+            if (index > 0) {
                 this.properties.put(en.getKey().substring(0, index), 
en.getValue());
-            }else{
+            } else {
                 this.properties.put(en.getKey(), en.getValue());
             }
         }
-        for(String rmKey:change.getRemovedProperties()){
+        for (String rmKey : change.getRemovedProperties()) {
             this.properties.remove(rmKey);
         }
-        try(BufferedOutputStream bos = new BufferedOutputStream(new 
FileOutputStream(file))){
+        try (BufferedOutputStream bos = new BufferedOutputStream(new 
FileOutputStream(file))) {
             Properties props = new Properties();
-            for (Map.Entry<String,String> en : this.properties.entrySet()) {
+            for (Map.Entry<String, String> en : this.properties.entrySet()) {
                 props.setProperty(en.getKey(), en.getValue());
             }
             props.store(bos, "Properties written from Tamaya on " + new 
Date());
             bos.flush();
-        }
-        catch(Exception e){
+        } catch (Exception e) {
             throw new ConfigException("Failed to write config to " + file, e);
         }
     }
 
     @Override
     protected String toStringValues() {
-        return  super.toStringValues() +
+        return super.toStringValues() +
                 "  file=" + file + '\n';
     }
 
diff --git 
a/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutableXmlPropertiesPropertySource.java
 
b/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutableXmlPropertiesPropertySource.java
index 99d7097..510ba81 100644
--- 
a/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutableXmlPropertiesPropertySource.java
+++ 
b/modules/mutable-config/src/main/java/org/apache/tamaya/mutableconfig/propertysources/MutableXmlPropertiesPropertySource.java
@@ -41,7 +41,7 @@ import java.util.logging.Logger;
  * Simple implementation of a mutable {@link 
org.apache.tamaya.spi.PropertySource} for .xml properties files.
  */
 public class MutableXmlPropertiesPropertySource extends BasePropertySource
-implements MutablePropertySource{
+        implements MutablePropertySource {
 
     /**
      * The logger.
@@ -72,8 +72,8 @@ implements MutablePropertySource{
      * Creates a new Properties based PropertySource based on the given URL.
      *
      * @param propertiesLocation the URL encoded location, not null.
-     * @param defaultOrdinal the default ordinal to be used, when no ordinal 
is provided with the property
-     *                       source's properties.
+     * @param defaultOrdinal     the default ordinal to be used, when no 
ordinal is provided with the property
+     *                           source's properties.
      */
     public MutableXmlPropertiesPropertySource(File propertiesLocation, int 
defaultOrdinal) {
         super(propertiesLocation.toString(), defaultOrdinal);
@@ -86,11 +86,10 @@ implements MutablePropertySource{
     }
 
 
-
     @Override
     public PropertyValue get(String key) {
         String val = this.properties.get(key);
-        if(val!=null) {
+        if (val != null) {
             return PropertyValue.createValue(key, val).setMeta("source", 
getName());
         }
         return null;
@@ -98,7 +97,7 @@ implements MutablePropertySource{
 
     @Override
     public Map<String, PropertyValue> getProperties() {
-        return PropertyValue.map(this.properties,getName());
+        return PropertyValue.map(this.properties, getName());
     }
 
     /**
@@ -124,46 +123,45 @@ implements MutablePropertySource{
 
     @Override
     public void applyChange(ConfigChangeRequest configChange) {
-        if(configChange.isEmpty()){
+        if (configChange.isEmpty()) {
             LOG.info("Nothing to commit for transaction: " + 
configChange.getTransactionID());
             return;
         }
-        if(!file.exists()){
+        if (!file.exists()) {
             try {
-                if(!file.createNewFile()){
+                if (!file.createNewFile()) {
                     throw new ConfigException("Failed to createObject config 
file " + file);
                 }
             } catch (IOException e) {
                 throw new ConfigException("Failed to createObject config file 
" + file, e);
             }
         }
-        for(Map.Entry<String,String> 
en:configChange.getAddedProperties().entrySet()){
+        for (Map.Entry<String, String> en : 
configChange.getAddedProperties().entrySet()) {
             int index = en.getKey().indexOf('?');
-            if(index>0){
+            if (index > 0) {
                 this.properties.put(en.getKey().substring(0, index), 
en.getValue());
-            }else{
+            } else {
                 this.properties.put(en.getKey(), en.getValue());
             }
         }
-        for(String rmKey:configChange.getRemovedProperties()){
+        for (String rmKey : configChange.getRemovedProperties()) {
             this.properties.remove(rmKey);
         }
-        try(BufferedOutputStream bos = new BufferedOutputStream(new 
FileOutputStream(file))){
+        try (BufferedOutputStream bos = new BufferedOutputStream(new 
FileOutputStream(file))) {
             Properties props = new Properties();
-            for (Map.Entry<String,String> en : this.properties.entrySet()) {
+            for (Map.Entry<String, String> en : this.properties.entrySet()) {
                 props.setProperty(en.getKey(), en.getValue());
             }
             props.storeToXML(bos, "Properties written from Tamaya on " + new 
Date());
             bos.flush();
-        }
-        catch(Exception e){
+        } catch (Exception e) {
             throw new ConfigException("Failed to write config to " + file, e);
         }
     }
 
     @Override
     protected String toStringValues() {
-        return  super.toStringValues() +
+        return super.toStringValues() +
                 "  file=" + file + '\n';
     }
 
diff --git 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Activator.java 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Activator.java
index 9a7a404..3c42d87 100644
--- a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Activator.java
+++ b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Activator.java
@@ -19,7 +19,10 @@
 package org.apache.tamaya.osgi;
 
 import org.apache.tamaya.osgi.commands.TamayaConfigService;
-import org.osgi.framework.*;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.Constants;
+import org.osgi.framework.ServiceRegistration;
 import org.osgi.service.cm.ConfigurationAdmin;
 
 import java.util.Dictionary;
diff --git 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Backups.java 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Backups.java
index eca0c98..57e94a0 100644
--- a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Backups.java
+++ b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/Backups.java
@@ -36,21 +36,24 @@ final class Backups {
 
     private static final Logger LOG = 
Logger.getLogger(Backups.class.getName());
     public static final String TAMAYA_BACKUP = "tamaya.backup";
-    private static Map<String, Hashtable<String,?>> initialConfigState = new 
ConcurrentHashMap<>();
+    private static Map<String, Hashtable<String, ?>> initialConfigState = new 
ConcurrentHashMap<>();
 
-    private Backups(){}
+    private Backups() {
+    }
 
     /**
      * Sets the given backup for a PID.
-     * @param pid the PID, not null.
+     *
+     * @param pid    the PID, not null.
      * @param config the config to store.
      */
-    public static void set(String pid, Dictionary<String,?> config){
+    public static void set(String pid, Dictionary<String, ?> config) {
         initialConfigState.put(pid, toHashtable(config));
     }
 
     /**
      * Converts the dictionary to a hash table to enable serialization.
+     *
      * @param dictionary the config, not null.
      * @return the corresponding Hashtable
      */
@@ -58,8 +61,8 @@ final class Backups {
         if (dictionary == null) {
             return null;
         }
-        if(dictionary instanceof Hashtable){
-            return (Hashtable<String,?>) dictionary;
+        if (dictionary instanceof Hashtable) {
+            return (Hashtable<String, ?>) dictionary;
         }
         Hashtable<String, Object> map = new Hashtable<>(dictionary.size());
         Enumeration<String> keys = dictionary.keys();
@@ -72,83 +75,90 @@ final class Backups {
 
     /**
      * Removes a backup.
+     *
      * @param pid the PID, not null.
      * @return the removed dictionary or null if unknown
      */
-    public static Dictionary<String,?> remove(String pid){
+    public static Dictionary<String, ?> remove(String pid) {
         return initialConfigState.remove(pid);
     }
 
     /**
      * Removes all backups.
      */
-    public static void removeAll(){
+    public static void removeAll() {
         initialConfigState.clear();
     }
 
     /**
      * Get a backup for a PID.
+     *
      * @param pid the PID, not null.
      * @return the backup found, or null.
      */
-    public static Dictionary<String,?> get(String pid){
+    public static Dictionary<String, ?> get(String pid) {
         return initialConfigState.get(pid);
     }
 
     /**
      * Get all current stored backups.
+     *
      * @return The backups stored, by PID.
      */
-    public static Map<String,Dictionary<String,?>> get(){
+    public static Map<String, Dictionary<String, ?>> get() {
         return new HashMap<>(initialConfigState);
     }
 
     /**
      * Get all currently known PIDs.
+     *
      * @return the PIDs, never null.
      */
-    public static Set<String> getPids(){
+    public static Set<String> getPids() {
         return initialConfigState.keySet();
     }
 
     /**
      * Checks if a backup exists for a given PID.
+     *
      * @param pid the pid, not null.
      * @return {@code true} if there is a backup for the given PID, {@code 
false} otherwise.
      */
-    public static boolean contains(String pid){
+    public static boolean contains(String pid) {
         return initialConfigState.containsKey(pid);
     }
 
     /**
      * Saves the backups into the given config.
+     *
      * @param config the config, not null.
      */
-    public static void save(Dictionary<String,Object> config){
-        try{
+    public static void save(Dictionary<String, Object> config) {
+        try {
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(bos);
             oos.writeObject(initialConfigState);
             oos.flush();
             Base64.getEncoder().encode(bos.toByteArray());
             config.put(TAMAYA_BACKUP, 
Base64.getEncoder().encodeToString(bos.toByteArray()));
-        }catch(Exception e){
+        } catch (Exception e) {
             LOG.log(Level.SEVERE, "Failed to restore OSGI Backups.", e);
         }
     }
 
     /**
      * Restores the backups into the given config.
+     *
      * @param config the config, not null.
      */
     @SuppressWarnings("unchecked")
-       public static void restore(Dictionary<String,Object> config){
-        try{
-            String serialized = (String)config.get(TAMAYA_BACKUP);
-            if(serialized!=null) {
+    public static void restore(Dictionary<String, Object> config) {
+        try {
+            String serialized = (String) config.get(TAMAYA_BACKUP);
+            if (serialized != null) {
                 ByteArrayInputStream bis = new 
ByteArrayInputStream(Base64.getDecoder().decode(serialized));
                 ObjectInputStream ois = new ObjectInputStream(bis);
-                initialConfigState = (Map<String, Hashtable<String,?>>) 
ois.readObject();
+                initialConfigState = (Map<String, Hashtable<String, ?>>) 
ois.readObject();
                 ois.close();
             }
         } catch (Exception e) {
diff --git 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigChanger.java 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigChanger.java
index 28aaa55..0bbc526 100644
--- 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigChanger.java
+++ 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigChanger.java
@@ -153,8 +153,6 @@ final class ConfigChanger {
                     continue;
                 }
                 switch (opMode) {
-                    case EXTEND:
-                        break;
                     case OVERRIDE:
                         LOG.info(() -> "Setting key " + dictEntry.getKey() + " 
to " + configuredValue);
                         ConfigHistory.propertySet(pid,dictEntry.getKey(), 
configuredValue, dictEntry.getValue());
@@ -164,6 +162,9 @@ final class ConfigChanger {
                         LOG.info(() -> "Setting key " + dictEntry.getKey() + " 
to " + configuredValue);
                         ConfigHistory.propertySet(pid,dictEntry.getKey(), 
configuredValue, dictEntry.getValue());
                         dictionary.put(dictEntry.getKey(), configuredValue);
+                    case EXTEND:
+                    default:
+                        break;
                 }
             }
         }
@@ -173,13 +174,6 @@ final class ConfigChanger {
                 continue;
             }
             switch (opMode) {
-                case EXTEND:
-                    if(dictValue==null){
-                        LOG.info(() -> "Setting key " + configEntry.getKey() + 
" to " + configEntry.getValue());
-                        ConfigHistory.propertySet(pid,configEntry.getKey(), 
configEntry.getValue(), null);
-                        dictionary.put(configEntry.getKey(), 
configEntry.getValue());
-                    }
-                    break;
                 case OVERRIDE:
                     LOG.info(() -> "Setting key " + configEntry.getKey() + " 
to " + configEntry.getValue());
                     ConfigHistory.propertySet(pid,configEntry.getKey(), 
configEntry.getValue(), null);
@@ -192,6 +186,14 @@ final class ConfigChanger {
                         dictionary.put(configEntry.getKey(), 
configEntry.getValue());
                     }
                     break;
+                case EXTEND:
+                default:
+                    if(dictValue==null){
+                        LOG.info(() -> "Setting key " + configEntry.getKey() + 
" to " + configEntry.getValue());
+                        ConfigHistory.propertySet(pid,configEntry.getKey(), 
configEntry.getValue(), null);
+                        dictionary.put(configEntry.getKey(), 
configEntry.getValue());
+                    }
+                    break;
             }
         }
     }
diff --git 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigHistory.java 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigHistory.java
index 4256a55..d8a4fa0 100644
--- 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigHistory.java
+++ 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/ConfigHistory.java
@@ -27,51 +27,74 @@ import java.util.logging.Logger;
  * Class storing the history of changes applied to the OSGI configuration by 
Tamaya.
  * This class can be used in the future to restore the previous state, if 
needed.
  */
-public final class ConfigHistory implements Serializable{
+public final class ConfigHistory implements Serializable {
 
     private static final long serialVersionUID = 1L;
     private static final Logger LOG = 
Logger.getLogger(ConfigHistory.class.getName());
-    /** The key of the plugin OSGI configuration, where the history is 
stored/retrieved. */
+    /**
+     * The key of the plugin OSGI configuration, where the history is 
stored/retrieved.
+     */
     private static final String HISTORY_KEY = "tamaya.history";
 
-    public enum TaskType{
+    /**
+     * History entry type.
+     */
+    public enum TaskType {
         PROPERTY,
         BEGIN,
         END,
     }
-    /** The max number of changes tracked. */
+
+    /**
+     * The max number of changes tracked.
+     */
     private static int maxHistory = 10000;
-    /** The overall history. */
+    /**
+     * The overall history.
+     */
     private static List<ConfigHistory> history = new LinkedList<>();
 
-    /** The entry timestamp. */
+    /**
+     * The entry timestamp.
+     */
     private long timestamp = System.currentTimeMillis();
-    /** The entry type. */
+    /**
+     * The entry type.
+     */
     private TaskType type;
-    /** The previous createValue. */
+    /**
+     * The previous createValue.
+     */
     private Object previousValue;
-    /** The current createValue. */
+    /**
+     * The current createValue.
+     */
     private Object value;
-    /** The key. */
+    /**
+     * The key.
+     */
     private String key;
-    /** The target PID. */
+    /**
+     * The target PID.
+     */
     private String pid;
 
-    private ConfigHistory(TaskType taskType, String pid){
+    private ConfigHistory(TaskType taskType, String pid) {
         this.type = Objects.requireNonNull(taskType);
         this.pid = Objects.requireNonNull(pid);
     }
 
     /**
      * Creates and registers an entry when starting to configure a bundle.
-     * @param pid the PID
+     *
+     * @param pid  the PID
      * @param info any info.
      * @return the entry, never null.
      */
-    public static ConfigHistory configuring(String pid, String info){
+    public static ConfigHistory configuring(String pid, String info) {
         ConfigHistory h = new ConfigHistory(TaskType.BEGIN, pid)
                 .setValue(info);
-        synchronized (history){
+        synchronized (history) {
             history.add(h);
             checkHistorySize();
         }
@@ -80,14 +103,15 @@ public final class ConfigHistory implements Serializable{
 
     /**
      * Creates and registers an entry when finished to configure a bundle.
-     * @param pid the PID
+     *
+     * @param pid  the PID
      * @param info any info.
      * @return the entry, never null.
      */
-    public static ConfigHistory configured(String pid, String info){
+    public static ConfigHistory configured(String pid, String info) {
         ConfigHistory h = new ConfigHistory(TaskType.END, pid)
                 .setValue(info);
-        synchronized (history){
+        synchronized (history) {
             history.add(h);
             checkHistorySize();
         }
@@ -96,18 +120,19 @@ public final class ConfigHistory implements Serializable{
 
     /**
      * Creates and registers an entry when a property has been changed.
-     * @param pid the PID
-     * @param key the key, not null.
+     *
+     * @param pid           the PID
+     * @param key           the key, not null.
      * @param previousValue the previous createValue.
-     * @param value the new createValue.
+     * @param value         the new createValue.
      * @return the entry, never null.
      */
-    public static ConfigHistory propertySet(String pid, String key, Object 
value, Object previousValue){
+    public static ConfigHistory propertySet(String pid, String key, Object 
value, Object previousValue) {
         ConfigHistory h = new ConfigHistory(TaskType.PROPERTY, pid)
                 .setKey(key)
                 .setPreviousValue(previousValue)
                 .setValue(value);
-        synchronized (history){
+        synchronized (history) {
             history.add(h);
             checkHistorySize();
         }
@@ -116,44 +141,48 @@ public final class ConfigHistory implements Serializable{
 
     /**
      * Sets the maximum history getNumChilds.
+     *
      * @param maxHistory the getNumChilds
      */
-    static void setMaxHistory(int maxHistory){
+    static void setMaxHistory(int maxHistory) {
         ConfigHistory.maxHistory = maxHistory;
     }
 
     /**
      * Get the max history getNumChilds.
+     *
      * @return the max getNumChilds
      */
-    static int getMaxHistory(){
+    static int getMaxHistory() {
         return maxHistory;
     }
 
     /**
      * Access the current history.
+     *
      * @return the current history, never null.
      */
-    static List<ConfigHistory> getHistory(){
+    static List<ConfigHistory> getHistory() {
         return getHistory(null);
     }
 
     /**
      * Clears the history.
      */
-    static void clearHistory(){
+    static void clearHistory() {
         clearHistory(null);
     }
 
     /**
      * Clears the history for a PID.
+     *
      * @param pid the pid, null clears the full history.
      */
-    static void clearHistory(String pid){
-        synchronized (history){
-            if("*".equals(pid)) {
+    static void clearHistory(String pid) {
+        synchronized (history) {
+            if ("*".equals(pid)) {
                 history.clear();
-            }else{
+            } else {
                 history.removeAll(getHistory(pid));
             }
         }
@@ -161,11 +190,12 @@ public final class ConfigHistory implements Serializable{
 
     /**
      * Get the history for a PID.
+     *
      * @param pid the pid, null returns the full history.
      * @return the history, never null.
      */
     public static List<ConfigHistory> getHistory(String pid) {
-        if(pid==null || pid.isEmpty()){
+        if (pid == null || pid.isEmpty()) {
             return new ArrayList<>(history);
         }
         synchronized (history) {
@@ -179,7 +209,7 @@ public final class ConfigHistory implements Serializable{
         }
     }
 
-    public TaskType getType(){
+    public TaskType getType() {
         return type;
     }
 
@@ -228,9 +258,10 @@ public final class ConfigHistory implements Serializable{
     /**
      * This method saves the (serialized) history in the plugin's OSGI 
configuration using
      * the key {@link #HISTORY_KEY}.
+     *
      * @param osgiConfig the plugin config, not null.
      */
-    static void save(Dictionary<String,Object> osgiConfig){
+    static void save(Dictionary<String, Object> osgiConfig) {
         try {
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
             ObjectOutputStream oos = new ObjectOutputStream(bos);
@@ -244,13 +275,14 @@ public final class ConfigHistory implements Serializable{
 
     /**
      * Restores the history from the plugin's OSGI configuration.
+     *
      * @param osgiConfig THE OSGI dictionary, not null.
      */
     @SuppressWarnings("unchecked")
-       static void restore(Dictionary<String,Object> osgiConfig){
-        try{
-            String serialized = (String)osgiConfig.get(HISTORY_KEY);
-            if(serialized!=null) {
+    static void restore(Dictionary<String, Object> osgiConfig) {
+        try {
+            String serialized = (String) osgiConfig.get(HISTORY_KEY);
+            if (serialized != null) {
                 ByteArrayInputStream bis = new 
ByteArrayInputStream(Base64.getDecoder().decode(serialized));
                 ObjectInputStream ois = new ObjectInputStream(bis);
                 ConfigHistory.history = (List<ConfigHistory>) ois.readObject();
@@ -261,8 +293,8 @@ public final class ConfigHistory implements Serializable{
         }
     }
 
-    private static void checkHistorySize(){
-        while(history.size() > maxHistory){
+    private static void checkHistorySize() {
+        while (history.size() > maxHistory) {
             history.remove(0);
         }
     }
diff --git 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/TamayaConfigPlugin.java
 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/TamayaConfigPlugin.java
index a22c7b5..b35166e 100644
--- 
a/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/TamayaConfigPlugin.java
+++ 
b/modules/osgi/common/src/main/java/org/apache/tamaya/osgi/TamayaConfigPlugin.java
@@ -19,7 +19,13 @@
 package org.apache.tamaya.osgi;
 
 import org.apache.tamaya.osgi.commands.TamayaConfigService;
-import org.osgi.framework.*;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.BundleEvent;
+import org.osgi.framework.BundleListener;
+import org.osgi.framework.Constants;
+import org.osgi.framework.ServiceEvent;
+import org.osgi.framework.ServiceListener;
 import org.osgi.service.cm.Configuration;
 import org.osgi.service.cm.ConfigurationAdmin;
 
@@ -32,9 +38,11 @@ import java.util.logging.Logger;
  * Tamaya plugin that updates/extends the component configurations managed
  * by {@link ConfigurationAdmin}, based on the configured {@link Policy}.
  */
-public class TamayaConfigPlugin implements TamayaConfigService,BundleListener, 
ServiceListener{
+public class TamayaConfigPlugin implements TamayaConfigService, 
BundleListener, ServiceListener {
     static final String COMPONENTID = "TamayaConfigPlugin";
-    /** the logger. */
+    /**
+     * the logger.
+     */
     private static final Logger LOG = 
Logger.getLogger(TamayaConfigPlugin.class.getName());
 
     public static final String TAMAYA_POLICY_PROP = "tamaya-policy";
@@ -54,7 +62,7 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
 
     @Override
     public void serviceChanged(ServiceEvent event) {
-        switch(event.getType()){
+        switch (event.getType()) {
             case ServiceEvent.REGISTERED:
             case ServiceEvent.MODIFIED:
                 configureService(event);
@@ -62,17 +70,20 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
             case ServiceEvent.UNREGISTERING:
                 // unconfigure...? Currently nothing here.
                 break;
+            default:
+                break;
         }
     }
 
 
     /**
      * Create a new getConfig.
+     *
      * @param context the OSGI context
      */
     public TamayaConfigPlugin(BundleContext context) {
         configChanger = new ConfigChanger(context);
-        Dictionary<String,Object> props = getPluginConfig();
+        Dictionary<String, Object> props = getPluginConfig();
         Backups.restore(props);
         ConfigHistory.restore(props);
         initDefaultEnabled(props);
@@ -82,47 +93,49 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     }
 
     @Override
-    public void setAutoUpdateEnabled(boolean enabled){
+    public void setAutoUpdateEnabled(boolean enabled) {
         this.autoUpdateEnabled = enabled;
         setConfigValue(TAMAYA_AUTO_UPDATE_ENABLED_PROP, enabled);
     }
 
     @Override
-    public void setTamayaEnabledByDefault(boolean enabledByDefault){
+    public void setTamayaEnabledByDefault(boolean enabledByDefault) {
         this.enabledByDefault = enabledByDefault;
         setConfigValue(TAMAYA_ENABLED_PROP, enabledByDefault);
     }
 
     @Override
-    public boolean isTamayaEnabledByDefault(){
+    public boolean isTamayaEnabledByDefault() {
         return enabledByDefault;
     }
 
     @Override
-    public Policy getDefaultPolicy(){
+    public Policy getDefaultPolicy() {
         return defaultPolicy;
     }
 
     @Override
-    public void setDefaultPolicy(Policy mode){
+    public void setDefaultPolicy(Policy mode) {
         this.defaultPolicy = Objects.requireNonNull(mode);
         setConfigValue(Policy.class.getSimpleName(), defaultPolicy.toString());
     }
 
     @Override
     public void bundleChanged(BundleEvent event) {
-        switch(event.getType()){
+        switch (event.getType()) {
             case BundleEvent.STARTING:
             case BundleEvent.LAZY_ACTIVATION:
                 configureBundle(event.getBundle());
                 break;
+            default:
+                break;
         }
     }
 
     private void initConfigs() {
         // Check for matching bundles already installed...
-        for(Bundle bundle:configChanger.getContext().getBundles()){
-            switch(bundle.getState()){
+        for (Bundle bundle : configChanger.getContext().getBundles()) {
+            switch (bundle.getState()) {
                 case Bundle.ACTIVE:
                     configureBundle(bundle);
                     break;
@@ -133,39 +146,39 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     private void configureService(ServiceEvent event) {
         // Optional MANIFEST entries
         Bundle bundle = event.getServiceReference().getBundle();
-        if(!isBundleEnabled(bundle)){
+        if (!isBundleEnabled(bundle)) {
             return;
         }
-        String pid = 
(String)event.getServiceReference().getProperty(Constants.SERVICE_PID);
-        if(pid==null){
+        String pid = (String) 
event.getServiceReference().getProperty(Constants.SERVICE_PID);
+        if (pid == null) {
             LOG.finest("No service pid for: " + event.getServiceReference());
             return;
         }
         configChanger.configure(pid, event.getServiceReference().getBundle(), 
defaultPolicy, false, false);
-        Dictionary<String,Object> props = getPluginConfig();
+        Dictionary<String, Object> props = getPluginConfig();
         Backups.save(props);
         ConfigHistory.save(props);
         setPluginConfig(props);
     }
 
     @Override
-    public Dictionary<String,Object> updateConfig(String pid) {
+    public Dictionary<String, Object> updateConfig(String pid) {
         return updateConfig(pid, defaultPolicy, false, false);
     }
 
     @Override
-    public Dictionary<String,Object> updateConfig(String pid, boolean dryRun) {
+    public Dictionary<String, Object> updateConfig(String pid, boolean dryRun) 
{
         return updateConfig(pid, defaultPolicy, false, dryRun);
     }
 
     @Override
-    public Dictionary<String,Object> updateConfig(String pid, Policy opMode, 
boolean explicitMode, boolean dryRun) {
-        if(dryRun){
+    public Dictionary<String, Object> updateConfig(String pid, Policy opMode, 
boolean explicitMode, boolean dryRun) {
+        if (dryRun) {
             return configChanger.configure(pid, null, opMode, explicitMode, 
true);
-        }else {
+        } else {
             LOG.fine("Updating getConfig for pid...: " + pid);
-            Dictionary<String,Object> result = configChanger.configure(pid, 
null, opMode, explicitMode, false);
-            Dictionary<String,Object> props = getPluginConfig();
+            Dictionary<String, Object> result = configChanger.configure(pid, 
null, opMode, explicitMode, false);
+            Dictionary<String, Object> props = getPluginConfig();
             Backups.save(props);
             ConfigHistory.save(props);
             setPluginConfig(props);
@@ -174,38 +187,38 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     }
 
     private void configureBundle(Bundle bundle) {
-        if(!isBundleEnabled(bundle)){
+        if (!isBundleEnabled(bundle)) {
             return;
         }
         String tamayaPid = 
bundle.getHeaders().get(TAMAYA_CUSTOM_ROOT_MANIFEST);
-        String pid = tamayaPid!=null?tamayaPid:bundle.getSymbolicName();
-        if(pid==null){
+        String pid = tamayaPid != null ? tamayaPid : bundle.getSymbolicName();
+        if (pid == null) {
             pid = bundle.getLocation();
         }
-        if(pid==null){
-            LOG.finest(() -> "No PID/location for bundle " + 
bundle.getSymbolicName() + '('+bundle.getBundleId()+')');
+        if (pid == null) {
+            LOG.finest(() -> "No PID/location for bundle " + 
bundle.getSymbolicName() + '(' + bundle.getBundleId() + ')');
             return;
         }
         configChanger.configure(pid, bundle, defaultPolicy, false, false);
-        Dictionary<String,Object> props = getPluginConfig();
+        Dictionary<String, Object> props = getPluginConfig();
         Backups.save(props);
         ConfigHistory.save(props);
         setPluginConfig(props);
     }
 
     @Override
-    public boolean isBundleEnabled(Bundle bundle){
+    public boolean isBundleEnabled(Bundle bundle) {
         // Optional MANIFEST entries
         String bundleEnabledVal = 
bundle.getHeaders().get(TAMAYA_ENABLED_MANIFEST);
-        if(bundleEnabledVal==null && !enabledByDefault){
+        if (bundleEnabledVal == null && !enabledByDefault) {
             LOG.finest("tamaya.enabled=false: not configuring bundle: " + 
bundle.getSymbolicName());
             return false;
         }
-        if(bundleEnabledVal != null && 
!Boolean.parseBoolean(bundleEnabledVal)){
+        if (bundleEnabledVal != null && 
!Boolean.parseBoolean(bundleEnabledVal)) {
             LOG.finest("Bundle is explcitly disabled for Tamaya: " + 
bundle.getSymbolicName());
             return false;
         }
-        if(bundleEnabledVal != null && Boolean.parseBoolean(bundleEnabledVal)){
+        if (bundleEnabledVal != null && 
Boolean.parseBoolean(bundleEnabledVal)) {
             LOG.finest("Bundle is explicitly enabled for Tamaya: " + 
bundle.getSymbolicName());
             return true;
         }
@@ -213,62 +226,62 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     }
 
     // REVIEW is this method still needed at all?
-    private boolean isAutoUpdateEnabled(Bundle bundle, 
Dictionary<String,Object> props) {
+    private boolean isAutoUpdateEnabled(Bundle bundle, Dictionary<String, 
Object> props) {
         Object enabledVal = props.get(TAMAYA_AUTO_UPDATE_ENABLED_PROP);
-        if(enabledVal!=null){
+        if (enabledVal != null) {
             return Boolean.parseBoolean(enabledVal.toString());
         }
-        if(bundle!=null){
+        if (bundle != null) {
             enabledVal = 
bundle.getHeaders().get(TAMAYA_AUTO_UPDATE_ENABLED_MANIFEST);
-            if(enabledVal!=null){
+            if (enabledVal != null) {
                 return Boolean.parseBoolean(enabledVal.toString());
             }
         }
         return this.autoUpdateEnabled;
     }
 
-    private void initAutoUpdateEnabled(Dictionary<String,Object> props) {
+    private void initAutoUpdateEnabled(Dictionary<String, Object> props) {
         Object enabledVal = props.get(TAMAYA_AUTO_UPDATE_ENABLED_PROP);
-        if(enabledVal==null && 
System.getProperty(TAMAYA_AUTO_UPDATE_ENABLED_PROP)!=null){
+        if (enabledVal == null && 
System.getProperty(TAMAYA_AUTO_UPDATE_ENABLED_PROP) != null) {
             enabledVal = 
Boolean.parseBoolean(System.getProperty(TAMAYA_AUTO_UPDATE_ENABLED_PROP));
         }
-        if(enabledVal!=null){
+        if (enabledVal != null) {
             this.autoUpdateEnabled = 
Boolean.parseBoolean(enabledVal.toString());
         }
-        if(this.autoUpdateEnabled) {
+        if (this.autoUpdateEnabled) {
             LOG.info("Tamaya Automatic Config Update is enabled by default.");
-        }else{
+        } else {
             LOG.info("Tamaya Automatic Config Update is disabled by default.");
         }
     }
 
-    private void initDefaultEnabled(Dictionary<String,Object> props) {
+    private void initDefaultEnabled(Dictionary<String, Object> props) {
         Object enabledVal = props.get(TAMAYA_ENABLED_PROP);
-        if(enabledVal==null && System.getProperty(TAMAYA_ENABLED_PROP)!=null){
+        if (enabledVal == null && System.getProperty(TAMAYA_ENABLED_PROP) != 
null) {
             enabledVal = 
Boolean.parseBoolean(System.getProperty(TAMAYA_ENABLED_PROP));
         }
-        if(enabledVal!=null){
+        if (enabledVal != null) {
             this.enabledByDefault = 
Boolean.parseBoolean(enabledVal.toString());
         }
-        if(this.enabledByDefault) {
+        if (this.enabledByDefault) {
             LOG.info("Tamaya Config is enabled by default. Add Tamaya-Enabled 
to your bundle manifests to enable it.");
-        }else{
+        } else {
             LOG.info("Tamaya Config is not enabled by default. Add 
Tamaya-Disabled to your bundle manifests to disable it.");
         }
     }
 
-    private void initDefaultOpMode(Dictionary<String,Object> props) {
-        String opVal = (String)props.get(Policy.class.getSimpleName());
-        if(opVal!=null){
-            try{
+    private void initDefaultOpMode(Dictionary<String, Object> props) {
+        String opVal = (String) props.get(Policy.class.getSimpleName());
+        if (opVal != null) {
+            try {
                 defaultPolicy = Policy.valueOf(opVal);
-            }catch(Exception e){
-                LOG.warning("Invalid Policy: " + opVal +", using default: " + 
defaultPolicy);
+            } catch (Exception e) {
+                LOG.warning("Invalid Policy: " + opVal + ", using default: " + 
defaultPolicy);
             }
         }
     }
 
-    Dictionary<String, Object> getPluginConfig(){
+    Dictionary<String, Object> getPluginConfig() {
         Configuration config;
         try {
             config = 
configChanger.getConfigurationAdmin().getConfiguration(COMPONENTID);
@@ -285,7 +298,7 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
         }
     }
 
-    void setPluginConfig(Dictionary<String, Object> props){
+    void setPluginConfig(Dictionary<String, Object> props) {
         Configuration config;
         try {
             config = 
configChanger.getConfigurationAdmin().getConfiguration(COMPONENTID);
@@ -297,10 +310,10 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
         }
     }
 
-    void setConfigValue(String key, Object value){
+    void setConfigValue(String key, Object value) {
         try {
             Dictionary<String, Object> props = getPluginConfig();
-            if(props!=null) {
+            if (props != null) {
                 props.put(key, value);
                 setPluginConfig(props);
                 LOG.finest("Updated Tamaya Plugin createValue: " + key + "=" + 
value);
@@ -310,10 +323,10 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
         }
     }
 
-    Object getConfigValue(String key){
+    Object getConfigValue(String key) {
         try {
             Dictionary<String, Object> props = getPluginConfig();
-            if(props!=null){
+            if (props != null) {
                 return props.get(key);
             }
         } catch (Exception e) {
@@ -343,10 +356,10 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     }
 
     @Override
-    public boolean restoreBackup(String pid){
+    public boolean restoreBackup(String pid) {
         @SuppressWarnings("unchecked")
-               Dictionary<String,Object> config = (Dictionary<String,Object>) 
Backups.get(pid);
-        if(config==null){
+        Dictionary<String, Object> config = (Dictionary<String, Object>) 
Backups.get(pid);
+        if (config == null) {
             return false;
         }
         try {
@@ -360,7 +373,7 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
 
     @Override
     public boolean createBackup(String pid) {
-        if(!Backups.contains(pid)) {
+        if (!Backups.contains(pid)) {
             Backups.set(pid, getOSGIConfiguration(pid, null));
             return true;
         }
@@ -369,7 +382,7 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
 
     @Override
     public boolean deleteBackup(String pid) {
-        if(Backups.contains(pid)) {
+        if (Backups.contains(pid)) {
             Backups.remove(pid);
             return true;
         }
@@ -416,7 +429,7 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
                 return null;
             }
             props = config.getProperties();
-            if(section!=null){
+            if (section != null) {
                 return filter(props, section);
             }
             return props;
@@ -434,9 +447,9 @@ public class TamayaConfigPlugin implements 
TamayaConfigService,BundleListener, S
     private Dictionary<String, Object> filter(Dictionary<String, Object> 
props, String section) {
         Hashtable<String, Object> result = new Hashtable<>();
         Enumeration<String> keys = props.keys();
-        while(keys.hasMoreElements()){
+        while (keys.hasMoreElements()) {
             String key = keys.nextElement();
-            if(key.startsWith(section)){
+            if (key.startsWith(section)) {
                 result.put(key, props.get(key));
             }
         }
diff --git 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/BackupCommands.java
 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/BackupCommands.java
index 93f3dea..9b87077 100644
--- 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/BackupCommands.java
+++ 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/BackupCommands.java
@@ -28,6 +28,9 @@ import org.osgi.service.cm.ConfigurationAdmin;
 import java.io.IOException;
 import java.util.Objects;
 
+/**
+ * A Felix shell commands provider.
+ */
 public class BackupCommands {
 
     private BundleContext context;
diff --git 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/ConfigCommands.java
 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/ConfigCommands.java
index 5b26b4c..de47ae6 100644
--- 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/ConfigCommands.java
+++ 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/ConfigCommands.java
@@ -28,6 +28,9 @@ import org.osgi.framework.ServiceReference;
 import java.io.IOException;
 import java.util.Objects;
 
+/**
+ * A Felix shell commands provider.
+ */
 public class ConfigCommands {
 
     private BundleContext context;
diff --git 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/HistoryCommands.java
 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/HistoryCommands.java
index a0d6959..8463ac3 100644
--- 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/HistoryCommands.java
+++ 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/HistoryCommands.java
@@ -27,6 +27,9 @@ import org.osgi.framework.ServiceReference;
 import java.io.IOException;
 import java.util.Objects;
 
+/**
+ * A Felix shell commands provider.
+ */
 public class HistoryCommands {
 
     private BundleContext context;
diff --git 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/SettingsCommands.java
 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/SettingsCommands.java
index cf79f0a..cf38662 100644
--- 
a/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/SettingsCommands.java
+++ 
b/modules/osgi/gogo-shell/src/main/java/org/apache/tamaya/gogo/shell/SettingsCommands.java
@@ -29,6 +29,9 @@ import org.osgi.framework.ServiceReference;
 import java.io.IOException;
 import java.util.Objects;
 
+/**
+ * A Felix shell commands provider.
+ */
 public class SettingsCommands {
 
     private BundleContext context;
diff --git 
a/modules/osgi/injection/src/main/java/org/apache/tamaya/osgi/injection/Activator.java
 
b/modules/osgi/injection/src/main/java/org/apache/tamaya/osgi/injection/Activator.java
index 57b8010..8d55b3d 100644
--- 
a/modules/osgi/injection/src/main/java/org/apache/tamaya/osgi/injection/Activator.java
+++ 
b/modules/osgi/injection/src/main/java/org/apache/tamaya/osgi/injection/Activator.java
@@ -18,7 +18,11 @@
  */
 package org.apache.tamaya.osgi.injection;
 
-import org.osgi.framework.*;
+import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
+import org.osgi.framework.ServiceRegistration;
 
 import java.util.Dictionary;
 import java.util.Hashtable;
@@ -58,6 +62,9 @@ public class Activator implements BundleActivator {
         injector.stop();
     }
 
+    /**
+     * Tamaya injector service.
+     */
     static final class TamayaConfigInjectionService implements 
ConfigInjectionService{
 
         private TamayaOSGIInjector injector;
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/ApplyTamayaConfigCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/ApplyTamayaConfigCommand.java
index 9864ecc..c43e92a 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/ApplyTamayaConfigCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/ApplyTamayaConfigCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_apply_config", description="Show the 
current Tamaya configuration.")
 @Service
 public class ApplyTamayaConfigCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupCreateCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupCreateCommand.java
index dda367a..20ed420 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupCreateCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupCreateCommand.java
@@ -30,6 +30,9 @@ import org.osgi.service.cm.ConfigurationAdmin;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_backup_create", description="Creates a 
backup of a current OSGI configuration.")
 @Service
 public class BackupCreateCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupDeleteCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupDeleteCommand.java
index f8fe5fe..55d0d97 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupDeleteCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupDeleteCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_backup_delete", description="Deletes the 
OSGI configuration backup  of Tamya.")
 @Service
 public class BackupDeleteCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupListCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupListCommand.java
index edc5e88..68a8355 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupListCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupListCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_backup_list", description="List the 
backed-up OSGI configuration before Tamya applied changes.")
 @Service
 public class BackupListCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupRestoreCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupRestoreCommand.java
index e053bd2..9e600a2 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupRestoreCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/BackupRestoreCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_backup_restore", description="Restores 
the OSGI configuration backup of Tamya and disabled the PID for Tamaya 
configuration.")
 @Service
 public class BackupRestoreCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnableCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnableCommand.java
index a667224..45ce97e 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnableCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnableCommand.java
@@ -34,6 +34,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 import java.io.IOException;
 import java.util.List;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_enable", description="Enables or disable 
Tamaya by default for all bundles/services (default: enabled=false)." +
         " Disabling still allows to explicitly enable bundles using 
'tamaya-enable' manifest or OSGI config entries.")
 @Service
@@ -51,6 +54,9 @@ public class DefaultEnableCommand implements Action{
         return(ConfigCommands.setDefaultEnabled(configPlugin, enabled));
     }
 
+    /**
+     * Karaf code completion.
+     */
     @Service
     public static final class OperationModeCompleter implements Completer {
 
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnabledCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnabledCommand.java
index 7b29af7..f5ce13c 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnabledCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/DefaultEnabledCommand.java
@@ -33,6 +33,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 import java.io.IOException;
 import java.util.List;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_enabled", description="Check if Tamaya 
is currently by default enabled for all bundles/services (default: 
enabled=false)." +
         " If disabled still Tamaya allows to explicitly enable bundles using 
'tamaya-enable' manifest or OSGI config entries.")
 @Service
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/GetPolicyCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/GetPolicyCommand.java
index 71830ca..c393418 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/GetPolicyCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/GetPolicyCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_policy", description="Get the current 
Tamaya overriding policy.")
 @Service
 public class GetPolicyCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteAllCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteAllCommand.java
index 2e816dd..e1dc4be 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteAllCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteAllCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_history_delete_all", 
description="Deletes the full getHistory of changes Tamaya applied to the OSGI 
configuration.")
 @Service
 public class HistoryDeleteAllCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteCommand.java
index d9df7e0..c7fa3a0 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryDeleteCommand.java
@@ -18,7 +18,9 @@
  */
 package org.apache.tamaya.karaf.shell;
 
-import org.apache.karaf.shell.api.action.*;
+import org.apache.karaf.shell.api.action.Action;
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
 import org.apache.karaf.shell.api.action.lifecycle.Reference;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.tamaya.osgi.commands.HistoryCommands;
@@ -26,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_history_delete", description="Deletes 
the getHistory of changes Tamaya applied to the OSGI configuration.")
 @Service
 public class HistoryDeleteCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryGetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryGetCommand.java
index ec221fc..1a2e324 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryGetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryGetCommand.java
@@ -18,7 +18,11 @@
  */
 package org.apache.tamaya.karaf.shell;
 
-import org.apache.karaf.shell.api.action.*;
+import org.apache.karaf.shell.api.action.Action;
+import org.apache.karaf.shell.api.action.Argument;
+import org.apache.karaf.shell.api.action.Command;
+import org.apache.karaf.shell.api.action.Completion;
+import org.apache.karaf.shell.api.action.Option;
 import org.apache.karaf.shell.api.action.lifecycle.Reference;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.karaf.shell.api.console.CommandLine;
@@ -32,6 +36,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 import java.io.IOException;
 import java.util.List;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_history", description="Gets the 
getHistory of changes Tamaya applied to the OSGI configuration.")
 @Service
 public class HistoryGetCommand implements Action{
@@ -53,6 +60,9 @@ public class HistoryGetCommand implements Action{
         return HistoryCommands.getHistory(configPlugin, pid, eventTypes);
     }
 
+    /**
+     * Karaf completer action.
+     */
     @Service
     public static final class FilterCompleter implements Completer {
 
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeCommand.java
index 4add8f6..2555a59 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeCommand.java
@@ -18,7 +18,8 @@
  */
 package org.apache.tamaya.karaf.shell;
 
-import org.apache.karaf.shell.api.action.*;
+import org.apache.karaf.shell.api.action.Action;
+import org.apache.karaf.shell.api.action.Command;
 import org.apache.karaf.shell.api.action.lifecycle.Reference;
 import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.tamaya.osgi.commands.HistoryCommands;
@@ -26,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_history_maxsize", description="Gets the 
maximal getNumChilds of stored getHistory entries.")
 @Service
 public class HistoryMaxsizeCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeSetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeSetCommand.java
index ae4cca4..960bfd7 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeSetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/HistoryMaxsizeSetCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_history_maxsize_set", description="Sets 
the maximal getNumChilds of Tamaya getHistory entries.")
 @Service
 public class HistoryMaxsizeSetCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/InfoCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/InfoCommand.java
index cb8f826..94d7278 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/InfoCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/InfoCommand.java
@@ -27,6 +27,9 @@ import org.apache.karaf.shell.api.action.lifecycle.Service;
 import org.apache.tamaya.osgi.commands.ConfigCommands;
 import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_info", description="Show he current 
Tamaya status.")
 @Service
 public class InfoCommand  implements Action {
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/OSGIConfigCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/OSGIConfigCommand.java
index 128aa78..334c31f 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/OSGIConfigCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/OSGIConfigCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_osgi_config", description="Show the 
current OSGI configuration.")
 @Service
 public class OSGIConfigCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicyGetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicyGetCommand.java
index e38e017..107f30b 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicyGetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicyGetCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_policy", description="Gets the current 
Tamaya operation policy.")
 @Service
 public class PolicyGetCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicySetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicySetCommand.java
index 10e317f..cb67a3d 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicySetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PolicySetCommand.java
@@ -35,6 +35,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 import java.io.IOException;
 import java.util.List;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_policy_set", description="Sets the 
current Tamaya operation policy.")
 @Service
 public class PolicySetCommand implements Action{
@@ -52,6 +55,9 @@ public class PolicySetCommand implements Action{
         return(ConfigCommands.setDefaultOpPolicy(configPlugin, policy));
     }
 
+    /**
+     * Completer command.
+     */
     @Service
     public static final class OperationModeCompleter implements Completer {
 
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesCommand.java
index 129e9fc..5a2dcc5 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesCommand.java
@@ -26,6 +26,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_propagate_updates",
         description="Flag if Tamaya is automatically triggering OSGI config 
updates, when according " +
                 "Tamaya configuration changes.")
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesSetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesSetCommand.java
index ff5dc95..c018204 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesSetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropagateUpdatesSetCommand.java
@@ -28,6 +28,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_propagate_updates_set",
         description="Configure if Tamaya is automatically triggering OSGI 
config updates, when according " +
                 "Tamaya configuration changes.")
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertyGetCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertyGetCommand.java
index b4e62f0..d141d8e 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertyGetCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertyGetCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.ConfigCommands;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_property", description="Get a Tamaya 
property.")
 @Service
 public class PropertyGetCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourceCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourceCommand.java
index 97ff4ae..4dea80b 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourceCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourceCommand.java
@@ -26,6 +26,9 @@ import org.apache.tamaya.osgi.commands.ConfigCommands;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_propertysource", description="Show the 
current Tamaya entries of a propertysource.")
 @Service
 public class PropertySourceCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourcesCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourcesCommand.java
index 8301914..b2167f4 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourcesCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/PropertySourcesCommand.java
@@ -25,6 +25,9 @@ import org.apache.tamaya.osgi.commands.ConfigCommands;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_propertysources", description="Get a 
createList of currently registered propertysources.")
 @Service
 public class PropertySourcesCommand implements Action{
diff --git 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/TamayaConfigCommand.java
 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/TamayaConfigCommand.java
index e66d27b..8b673b7 100644
--- 
a/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/TamayaConfigCommand.java
+++ 
b/modules/osgi/karaf-shell/src/main/java/org/apache/tamaya/karaf/shell/TamayaConfigCommand.java
@@ -27,6 +27,9 @@ import org.apache.tamaya.osgi.commands.TamayaConfigService;
 
 import java.io.IOException;
 
+/**
+ * A Karaf shell command.
+ */
 @Command(scope = "tamaya", name = "tm_config", description="Show the current 
Tamaya configuration.")
 @Service
 public class TamayaConfigCommand implements Action{
diff --git 
a/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/Activator.java
 
b/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/Activator.java
index a97e8f3..20fe0ab 100644
--- 
a/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/Activator.java
+++ 
b/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/Activator.java
@@ -21,7 +21,9 @@ package org.apache.tamaya.osgi.updater;
 import org.apache.tamaya.events.ConfigEventManager;
 import org.apache.tamaya.events.ConfigurationChange;
 import org.apache.tamaya.osgi.commands.TamayaConfigService;
-import org.osgi.framework.*;
+import org.osgi.framework.BundleActivator;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
 import org.osgi.service.cm.ConfigurationAdmin;
 
 import java.util.Timer;
diff --git 
a/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/EventListener.java
 
b/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/EventListener.java
index 68e9bcb..a7d648f 100644
--- 
a/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/EventListener.java
+++ 
b/modules/osgi/updater/src/main/java/org/apache/tamaya/osgi/updater/EventListener.java
@@ -23,7 +23,8 @@ import org.apache.tamaya.events.ConfigEventListener;
 import org.apache.tamaya.events.ConfigurationChange;
 import org.apache.tamaya.osgi.Policy;
 import org.apache.tamaya.osgi.commands.TamayaConfigService;
-import org.osgi.framework.*;
+import org.osgi.framework.BundleContext;
+import org.osgi.framework.ServiceReference;
 import org.osgi.service.cm.ConfigurationAdmin;
 
 import java.beans.PropertyChangeEvent;

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