public class MapElement
{

}
@@ -19,10 +19,134 @@
 ement%0A%7B%0A
+    public static final char TREE = '#';%0A    public static final char OPEN = '.';%0A    %0A    private MapElement ()%0A    %7B%0A    %7D
 %0A%7D

Update MapElement.java