title: Netbeans platform custom configuration file
body: <p>I'm trying to create configuration file for database connection. Properties file would be best. This properties have to be changed after every application installation (customers database).</p>
  
  <ul>
  <li><p>I want this config file in the root of application (netbeans platform
  project, and distro folder). I can't find way how to refer to
  application root folder.</p></li>
  <li><p>I also find lack of documentation for FileUtil.getConfigFile/Root. I
  don't know where to find the configRoot (if it is even physical), or
  how to add ConfigFile offline (not in code, but just with copying
  config file).</p></li>
  <li><p>Tolerable solution woud be to add database configuration to system
  properties, but i can't find where to specify additional system properties
  in netbeans configuration files.</p></li>
  </ul>