title: IntelliJ Java compile can't find symbol of attached modules
body: <p>I love the hot swap feature of Java and i'm using it a lot while debugging. I can't compile single classes that contains references to a class from another module in IntelliJ though (with CTRL + SHIFT + F9).
  The error I get is the common <em>java: cannot find symbol</em>. Seems that the compiler doesn't see the other module.</p>
  
  <p>The module is included under Project structure. Should I configure something else? </p>