Scenario: Jenkins maven job ("maven project") for multi module project

Error: In a maven multi-module projekt the checkstyle plugin summarizes all violations of the modules and adds this value to the parent module, resulting in double amount of violations and duplicate violation messages.

Expectation: Expectation is that no report is made for the parent as it has no soures and therefor no violations, like the EAR-module for which are no violations are shown in the overview.

Other:

This does not happen in findbugs or pmd plugin (only screenshot of findbugs is added)

Structure if the project is default multi module:

parent (only pom)
|- EJB-module
|- WS-module
|- WAR-module