Adding stuff to Maven build to create a plugin

I've been told that the Google Docs functionality should be built as a plugin, yet there is no documentation about building plugins for xwiki. I need to start adding code to the build to test it, but I need to know how I should go about it. Also, what was the decision regarding the migration to JDK 1.5? I need to add some libs to the build that require it. The libs are provided by google as source that is supposed to be built, and then the jars imported, which I'm told Maven can handle... how? I'd like it if somebody could take the time guide me through the process. Thanks, Radu