Check out this project: https://github.com/ocpsoft/rewrite
Import in as an existing maven project.
rewrite-impl-servlet is a web fragment but Web Fragment Module is not installed. The project gets Utility Module instead.
It's rather m2e-wtp integration issue I guess, but anyway I'm reporting it here to track the issue.
It's important for us since we are going to add JBoss KB builder to such projects to have content assist/openOns/validation enabled automatically - See JBIDE-9280