[michaelneale]

Yes reverse engineering is trivial (unless a very good obfuscator is used) if you have the binary jar files.

However, like others have mentioned, its highly likely there is nothing there of value - so you there is a pretty good chance you will have to write it off.

I have heard of similar things happening to this - commonly when the development is done in SE asia (have heard of several cases in the Philippines of this exact thing happening, interestingly).