--- a/java.source/src/org/netbeans/modules/java/source/parsing/FileObjects.java	Mon Mar 28 14:50:33 2011 +0200
+++ a/java.source/src/org/netbeans/modules/java/source/parsing/FileObjects.java	Mon Mar 28 16:24:42 2011 +0200
@@ -547,6 +547,7 @@ 
     }
     
     public static String getRelativePath (final String packageName, final String relativeName) {
+        if (packageName.isEmpty()) return relativeName;
         StringBuilder relativePath = new StringBuilder ();
         relativePath.append(packageName.replace('.','/'));
         relativePath.append('/');