Fix malformed Javadocs

[Skylion007]

So pull request #79 was kind enough to update the Maven packages which a bunch of code style checkers and such. However, one of those checkers generate Javadocs and since many of the javadocs throughout the code base are malformed, we will need fix this before this module works. Until then, if you are trying to build through source I suggest you skip Javadocs module using appropriate Maven arguments. Unfortunately, as it is the middle of exam period, I probably won't have time to resolve this issue immediately however the fix is rather simple.