Integrating xwiki into IntelliJ

I'm attempting to integrate xwiki into IntelliJ to run, compile, and debug. I have Tomcat and a local copy of Xwiki running on my machine. I've obtained the xwiki source code from the SVN and I would like to be able to compile it to test. I haven't made any changes to the code as of yet, first I just want to get IntelliJ and xwiki working correctly together first. I'm not exactly sure how to setup xwiki in Intellij, that is my main question. I tried starting a New Project, choosing the xwiki/trunk/src as my directory for the source files. I wasn't sure where to put output directory so it just made a new folder inside the xwiki direcotory. When I attempt to Build (make project) I'm getting errors stating that duplicate classes are being found. I'm assuming I set it up wrong and I put the output directory in the wrong place or something. Does anyone know what I could be doing wrong and a good set of instructions to follow to get this working? Thanks