Several warnings about non initialized class members

[BishopWolf]

There are a bunch of warnings about non initialized class members that are thrown by the Eclipse's syntax checker, all these can lead to potential bugs since the member can be called without being initialized in the class constructor. The code works now because there is a detailed use of these members, initializing before calling them, but for future modifications this is dangerous. This issue involves a lot of changes since there are more than 50 classes (quick count) that fail into this.