diff -up freecol/src/net/sf/freecol/FreeCol.java.orig freecol/src/net/sf/freecol/FreeCol.java

--- freecol/src/net/sf/freecol/FreeCol.java.orig	2015-10-17 15:28:05.641962462 +0200

+++ freecol/src/net/sf/freecol/FreeCol.java	2015-10-17 15:30:55.722110493 +0200

@@ -426,8 +426,8 @@ public final class FreeCol {

     private static void handleArgs(String[] args) {

         Options options = new Options();

         final String help = Messages.message("cli.help");

-        final File dummy = new File("dummy");

         final String argDirectory = Messages.message("cli.arg.directory");

+        final Class dummy = null;

         // Help options.

         options.addOption(OptionBuilder.withLongOpt("usage")