title: What should I put in the target directory?
body: <p>I'm making a Maven plugin. I use another library that downloads files and put them in a directory if they don't exist, of if they are too old, then my code use the files.</p>
  
  <p>I don't want this file by commit by mistake by the devs using my plugin.</p>
  
  <p>Is that a good practice to put this "temporary" files in the target directory? </p>
  
  <p>Some other plugin create their own "target-custom" to do it (for example <code>grunt-maven-plugin</code> create a <code>target-grunt</code> directory).</p>