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")