[INFO] [INFO] ------------------------------------------------------------------------
[INFO] [ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce (check-java-compat) on project codenvy-dto: Execution check-java-compat of goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce failed. NullPointerException -> [Help 1]
[INFO] org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce (check-java-compat) on project codenvy-dto: Execution check-java-compat of goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce failed.
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions(MojoExecutor.java:365)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:199)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
[INFO] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
[INFO] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
[INFO] at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
[INFO] at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
[INFO] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:320)
[INFO] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
[INFO] at org.apache.maven.cli.MavenCli.execute(MavenCli.java:537)
[INFO] at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
[INFO] at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[INFO] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
[INFO] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[INFO] at java.lang.reflect.Method.invoke(Method.java:606)
[INFO] at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
[INFO] at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
[INFO] at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
[INFO] at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
[INFO] Caused by: org.apache.maven.plugin.PluginExecutionException: Execution check-java-compat of goal org.apache.maven.plugins:maven-enforcer-plugin:1.3.1:enforce failed.
[INFO] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:110)
[INFO] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
[INFO] ... 23 more
[INFO] Caused by: java.lang.NullPointerException
[INFO] at org.codehaus.mojo.animal_sniffer.SignatureChecker$CheckingVisitor.visitSource(SignatureChecker.java:268)
[INFO] at org.objectweb.asm.ClassReader.accept(Unknown Source)
[INFO] at org.objectweb.asm.ClassReader.accept(Unknown Source)
[INFO] at org.codehaus.mojo.animal_sniffer.SignatureChecker.process(SignatureChecker.java:156)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processClassFile(ClassFileVisitor.java:178)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:103)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:83)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.processDirectory(ClassFileVisitor.java:121)
[INFO] at org.codehaus.mojo.animal_sniffer.ClassFileVisitor.process(ClassFileVisitor.java:99)
[INFO] at org.codehaus.mojo.animal_sniffer.enforcer.CheckSignatureRule.execute(CheckSignatureRule.java:127)
[INFO] at org.apache.maven.plugins.enforcer.EnforceMojo.execute(EnforceMojo.java:177)
[INFO] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:101)
[INFO] ... 24 more
