Minor Description
On the 7.x development stream on master, the parent POM includes the Clirr Maven Plugin, although it is "Disabled until 7.0" according to the comments.
There is no Eclipse 4.4 plugin on the marketplace for handling clirr-maven-plugin, so unless the plugin is explicitly set to be ignored or executed, Eclipse will find build errors in the project.
The simplest approach for the time being would be to add an Eclipse lifecycle mapping to the parent POM, indicating that Eclipse should ignore the plugin (as it is disabled anyway, even in a normal Maven build outside of Eclipse).