Started Update PDDG Method

src/AI.java

@@ -35,6 +35,9 @@ public static int generatePD(int shipLength, int[] distance) {
 	 * Generates the initial population density distributed graph for the given
 	 * number of ships for each square in a given grid. Runs only at the beginning
 	 * of the game.
+	 * 
+	 * @param grid
+	 *            The grid for which to calculate the initial PDDG
 	 */
 	public static void generatePDDG(Square[][] grid) {
 		int[] distance;
@@ -46,6 +49,10 @@ public static void generatePDDG(Square[][] grid) {
 				}
 	}
 
+	public static void updatePPDG() {
+
+	}
+
 	/**
 	 * Finds the highest likely location of a ship
 	 * 
@@ -201,6 +208,7 @@ public static void placeShips(Square[][] grid, int[] shipLengths) {
 	 *         is overlapping another ship
 	 */
 	public static boolean checkValidShipPosition(int Y, int X, int endY, int endX, int rotation, Square[][] grid) {
+
 		// first we must check to see if the end values are within the board size
 		if (endX >= grid.length || endX < 0 || endY >= grid[0].length || endY < 0)
 			return false;