Add missing @Override annotations

[stephengold]

No description provided.

[MeFisto94]

Awesome! Thanks :)

[stephengold]

One sub-project done, 21 still to go...

[tonihele]

I added yesterday to Nifty subproject. Just didnt make PR. But encouraged by this. Ill make one as soon as I get home. Those and finals and some cleanup.

…

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[stephengold]

Thanks Toni. I'll leave jme3-nifty in your hands, then.

[tonihele]

Thanks Toni. I'll leave jme3-nifty in your hands, then.

#1271 :)

[stephengold]

I believe this is ready for integration. If it's not integrated in 72 hours, I may do it myself.