title: Package name does not correspond to blank file path
body: <p>In Android Studio 2.3.3, I get the following error in the java source files:</p>
  
  <blockquote>
    <p>Package name 'com.foo.bar' does not correspond to the file path ''</p>
  </blockquote>
  
  <p>Note the <em>blank</em> filepath in the error, which I believe differences this from possible duplicate questions about package names vs file paths.  This seems like something more than just the package statement is damaged. </p>
  
  <p>Assuming I know the top level directory on my own hard drive where this is installed (i.e., I know where StudioProjects is and have verified that they are there) how do I go about repairing this... or at least figure out what the correct package statement is?</p>
  
  <p><strong>Update:</strong>  Note that the manifest file <em>does</em> have a "package" tag, the contents of which I can copied directly into the package statements in the Java source files.  They were identical what was there before so the error persists. </p>