Eclipse compiler warnings

Hi,

I'm using eclipse compiler instead of javac because it gives better errors and compiles incrementally.

The problem i have is that despite having annotation such as @SuppressWarnings("rawtypes"), @SuppressWarnings({"unchecked"}). The compiler seems to ignore those annotations and I'm having endless stream of errors. 

For example the following statement:

@SuppressWarnings("rawtypes")
Pair other = (Pair) obj;

Produces the following errors:

Warning:(99, 9) java: *.Pair is a raw type. References to generic type *.Pair<E,F> should be parameterized
Warning:(99, 23) java: *.Pair is a raw type. References to generic type *.Pair<E,F> should be parameterized

(I removed the full qualified name)

Any ideas?

P.S: Please note I'm using eclipse 4.6.3 version and not the bundled 4.6.2, as that version have some bugs. But the same happened also on 4.6.2

Thanks you!