According to http://checkstyle.sourceforge.net/config.html#Packages, the package XML file should be in the root of the JAR providing the additional checks (sevntu-checks project) and is currently not. This would allow just the classname to be specified in the checks file like is done by the Eclipse plug-in.
See discussion here too: https://groups.google.com/forum/#!topic/sevntu-checkstyle/Krhy6UYeOAI
Issue #259: Include package XML file in the core library.
Issue #259: Include package XML file in the core library
Issue #259: added checkstyle package xml
Closing as file was added