title: Eclipse, Java - Exlude Folder from all Validation
body: <p>I want to exclude a folder from all validation in Eclipse. I got some generated folders (generated with npm for the grunt build) in my project and there are some files in there which have errors. Eclipse takes very long to validate these folders and even throws an eclipse exception (stackoverflow while validating).
  The maven build works perfectly.</p>
  
  <p>So I would like to excluse the whole folder and all subfolders from the validation. The only thing I found is preferences --> validation but there I can only exclude the folder from each validator (e.g. XSL,XML,Web, ...).</p>