refactoring:

src/main/java/BattleShip/GridGUI.java

@@ -40,7 +40,7 @@ public class GridGUI extends JPanel {
         allShips.add(battleship);
         allShips.add(aircraftCarrier);
 
-        for(int i = 1; i < (rows * columns); i++) {
+        for(int i = 0; i < (rows * columns); i++) {
             BSButton b = new BSButton();
             b.setEnabled(false);
             b.setGridLocation(i);