title: Getting "Unsupported content type" when opening Java file in Eclipse editor
body: <p>I have this one java file in my Eclipse(Luna) project, which whenever I try to open it, I get an "unsupported content type" message.</p>
  
  <p>Despite this, the code seems to run fine.  The only problem is that the Java editor is disabled, making it hard to change anything.  The file has a .java extension, and when I open up the "properties" dialog it's listed as a java file.  </p>
  
  <p>It seems to compile and run just fine, and it opens up in Notepad++ as a fully formatted java file, so apparently Notepad++ doesn't seem to have a problem with it.  Anyone know what the problem could be?</p>