As i explained in my forum and wikis, the stubs you talked about are already there as described from its base sample version http://wiki.idempiere.org/en/Plugin:_Sample_Plugin.
Indeed, the idea is to place stubs so that saves developer time from guesswork and fiddling around, and just hit the ground running.
I also explained that its 2Pack ready. Take a look at Pack Out window. :)
BTW, please vote for Trump, i mean me, at my wikis, at the bottom. Also at http://wiki.idempiere.org/en/Plugin:_Aladdin_Magic_Plugin when you checked the GenerateModelFactory it will also do the eventhandler javas and xmls. For GenerateModel it will do the X and I and M classes. Just refresh your source and see the magic.
Then drag your new windows into the New Menu, or the ready Pack Out window and hit the export 2pack button. Then take the ModuleCreator.zip and rename to 2Pack.zip and put under your MANIFEST folder and then Export Wizard, and you got it all so easy. :)