not sure the unified source directory structure addresses this issue.

 Properties

 maven.user.config.dir (system,default=${user.home}/.m2)
 maven.home            (system,user,default=${user.home}/m2)
 maven.repo.local      (system,user,default=${maven.user.config.dir}/repository)

 We need to define what happens in the when things are not setup correctly

 o ~/.m2 directory does not exist

        <configuration>
          <configLocation>http://svn.apache.org/repos/asf/maven/plugins/trunk/maven-checkstyle-plugin/src/main/resources/config/maven_checks.xml</configLocation>
          <headerLocation>http://svn.apache.org/repos/asf/maven/plugins/trunk/maven-checkstyle-plugin/src/main/resources/config/maven-header.txt</headerLocation>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>