A maven license plugin is available and run during the build process which validates .java, .xml and *.sql files for missing license headers.
The license plugin with the specified template is available to all projects in the release-parent hierarchy. It can be run locally through a profile defined on each project. Furthermore, a license check is run on all of the Jenkins jobs to assert that no license headers differ from the template.
Existing license headers need to be updated so that the plugin completes the checks successfully from the start.