It's possible to fix (or to set) the Copyright notice in the beginning of the file.
The plugin that fixes copyrights is not included by default in the distribution, but it can be downloaded using the Eclipse update site.
It's called "Eclipse Releng Tools".
The copyright header is set using Window -> Prefernces -> Copyright Tool.
In order to set this header for the whole project, switch to the "Resources" perspective and select "Advanced Fix Copyrights".