Using Rational Application Developer to create a J2EE application, I create a project for my EAR and a project for my WAR - following the usual project structure created by RAD.
So, how do I create a Maven build file that builds the EAR with the WAR inside, etc - ready to deploy. Build needs to work when kicked-off from Hudson.
If your EAR is a standard EAR, then "simply" use the Maven EAR plugin. If you need more specific guidance, please ask a more specific question.