I think you should change your workspace. I had a similar problem, after saving some code, i closed it and the next time i tried to start it, it just crashed.
So i changed my workspace to another folder and it worked.
If by this method your eclipse works, then just create a new project and paste the code from the previous project in this one.
Do not try to import the previous project, as that has been corrupted and hence is forcing eclipse to quit. Just copy and paste the code and then delete the previous workspace.
Hope this helps. :)