title: Eclipse: how to make directory trees show as packages
body: <p>In a typical project of mine, I have several source directories, each with the usual special icon in the package explorer.</p>
  
  <p>Since these are maven projects, some are full of Java code, and some are full of resources.</p>
  
  <p>Some of the resource trees show the subdirs as packages, but others just show them as folders.</p>
  
  <p>Anyone know how to get them all to show as packages?</p>