public class TileData
{
    public static final char HASH = '#';
    public static final char SPACE = '.';
    
    public static final String TILE_ID = "Tile ";
    
    private TileData ()
    {
    }
}
@@ -99,16 +99,31 @@
 E = '.';
+  // unoccupied
 %0A    %0A  

Update TileData.java