when you run mvn --version part of the output includes the locale and pratform encoding. For example: Default locale: en_GB, platform encoding: Cp1252
mvn --version
Default locale: en_GB, platform encoding: Cp1252
Best solution is:
... UTF-8 UTF-8 ... ...
More: http://www.sonatype.com/people/2009/11/special-character-encoding-properties/