The error shown afterwards:
“Java was started but returned exit code=-805306369”
This however wasn’t the problem as I was running Java 1.6.0_31b05. Tried to uninstall and reinstall Java but no success. Tried to look through the plugins I was using but nothing.
The error was due to a corrupt workspace. As I disable the workspace check in the startup I couldn’t select another workspace since Eclipse wouldn’t start. Rename the workspace e.g. to “workspace1”. Eclipse will start and create a new uncorrupted workspace and work without any problems. Afterwards you can import your project into your new workspace and in the end remove the old corrupted workspace.