Hi @durium,
good catch, I added a link to where you find the missing BombControl.java sample code.
If the ImageBasedHeightMap doesn’t work, a possible reason could be that the linked source code is for the very latest (nightly) build, and you use an older stable build of jme3.
The heightmap constrcutor used to be this, maybe that works for you:
heightmap = new ImageBasedHeightMap(ImageToAwt.convert(heightMapImage.getImage(), false, true, 0), 0.25f);
But in the long run I’d recommened to update to a more recent version.