#1 Generify everythign & more

[mmilleder]

Since I wanted to take a look at the source, I have loaded it into Eclipse and immediately noticed lots of warnings.

I have removed all unused imports.
I have fixed all raw type warnings - that looked interesting for a small exercise :-)

I have also replaced some concrete collection types with the respective interfaces, and I have made several default visible fields private.

Somebody with a real understanding of the code may be able to improve some of the type bounds.

Generally, I'd recommend compiling with -Xlint and fixing all warnings :-)

[mmilleder]

Generify everythign & more