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AndroMDA, in my opinion, can be easily used by Netbeans. Most of the diagram tools are there. Just need to update to UML 2.0 (but current will work) and add the ability to export diagrams as xmi files. From there it's just some wizards and settings. The Maven support is already there. I think that there's no need in reinventing the wheel. Of course I understand that using AndoMDA will bring a tool that's not currently on your control, but at least a support for AdroMDA/Maven projects will be a huge plus. I've been evaluating Eclipse just for it's support due to the power of that tool. I'm almost sure I won't be the only one tempted.