FYI, to whom can take the time to fix this. When I run 'mvn clean install', I get:
[INFO] --- maven-checkstyle-plugin:2.15:check (default) @ commons-configuration2 --- [INFO] There are 23 errors reported by Checkstyle 6.1.1 with C:\vcs\svn\apache\commons\trunks-proper\configuration/conf/checkstyle.xml ruleset. [ERROR] src\main\java\org\apache\commons\configuration2\AbstractHierarchicalConfiguration.java[976] (regexp) RegexpSingleline: Line has trailing spaces. [ERROR] src\main\java\org\apache\commons\configuration2\AbstractHierarchicalConfiguration.java[978:30] (blocks) LeftCurly: '{' should be on a new line. [ERROR] src\main\java\org\apache\commons\configuration2\AbstractYAMLBasedConfiguration.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\builder\fluent\INIBuilderParameters.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\builder\INIBuilderParametersImpl.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\builder\INIBuilderParametersImpl.java[42:5] (whitespace) FileTabCharacter: File contains tab characters (this is the first instance). [ERROR] src\main\java\org\apache\commons\configuration2\builder\INIBuilderParametersImpl.java[52:84] (blocks) LeftCurly: '{' should be on a new line. [ERROR] src\main\java\org\apache\commons\configuration2\builder\INIBuilderProperties.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\ex\ConfigurationRuntimeException.java[68] (regexp) RegexpSingleline: Line has trailing spaces. [ERROR] src\main\java\org\apache\commons\configuration2\JSONConfiguration.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\JSONConfiguration.java[43:5] (javadoc) JavadocVariable: Missing a Javadoc comment. [ERROR] src\main\java\org\apache\commons\configuration2\JSONConfiguration.java[44:5] (javadoc) JavadocVariable: Missing a Javadoc comment. [ERROR] src\main\java\org\apache\commons\configuration2\tree\ImmutableNode.java[106] (regexp) RegexpSingleline: Line has trailing spaces. [ERROR] src\main\java\org\apache\commons\configuration2\tree\ImmutableNode.java[114:27] (blocks) LeftCurly: '{' should be on a new line. [ERROR] src\main\java\org\apache\commons\configuration2\tree\ImmutableNode.java[117] (regexp) RegexpSingleline: Line has trailing spaces. [ERROR] src\main\java\org\apache\commons\configuration2\tree\ImmutableNode.java[666] (regexp) RegexpSingleline: Line has trailing spaces. [ERROR] src\main\java\org\apache\commons\configuration2\XMLConfiguration.java[1169:15] (whitespace) WhitespaceAround: 'if' is not followed by whitespace. [ERROR] src\main\java\org\apache\commons\configuration2\XMLConfiguration.java[1210:15] (whitespace) WhitespaceAround: 'if' is not followed by whitespace. [ERROR] src\main\java\org\apache\commons\configuration2\XMLConfiguration.java[1212:19] (whitespace) WhitespaceAround: 'if' is not followed by whitespace. [ERROR] src\main\java\org\apache\commons\configuration2\XMLConfiguration.java[1311:20] (whitespace) WhitespaceAround: 'if' is not followed by whitespace. [ERROR] src\main\java\org\apache\commons\configuration2\XMLListReference.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [ERROR] src\main\java\org\apache\commons\configuration2\XMLListReference.java[45] (design) FinalClass: Class XMLListReference should be declared as final. [ERROR] src\main\java\org\apache\commons\configuration2\YAMLConfiguration.java[0] (misc) NewlineAtEndOfFile: File does not end with a newline. [WARNING] checkstyle:check violations detected but failOnViolation set to false Gary