Thank you. That's exactly where the problem was. Issue is now fully solved. I guess I just somehow forgot the existence of 3.3 version of Oxygen plugin, while being too busy trying other solutions.

I tried multiple distributions of Eclipse and different combinations of plugins I regularly use, and I found out, that only with fresh installation of basic Eclipse 3.2.2 SDK, Oxygen plugin will work as it is supposed to. However, certain plugins require plugins, which require plugins, which require...