Increase readability of the code

[bric3]

Without changing behavior, we can

• give more meaningful method and field names
• use generics in the code internals

[abailly]

That could be done as part of various developments, instead of a single pass at the onset which basically is boring and does not add value. I suggest we stick to the convention that "one leaves the campground cleaner than it found it" :-) In other words, as soon as we touch a source file, we should improve its readability.

[bric3]

Yeah I aggree with you, and it might be costly to do that at once. I put this issue as a reminder, on mockito we have this long running issue of performant mocks :)