Update Implementation AIGridGUI class

src/main/java/BattleShip/AIGridGUI.java

@@ -437,7 +437,9 @@ public class AIGridGUI extends JPanel {
 
     class SetShipsListener implements MouseListener {
         public void mouseEntered(MouseEvent e) {
-
+            //Highlight cell when mouse entered.
+            BSButton cell = (BSButton) e.getSource();
+            highlightCells(cell, 0);
         }
 
         public void mouseReleased(MouseEvent e) {
@@ -450,4 +452,10 @@ public class AIGridGUI extends JPanel {
         public void mouseClicked(MouseEvent e) {}
         public void mousePressed(MouseEvent e) {}
     }
+
+    public void highlightCells(BSButton b, int x) {
+        BSButton cell = b;
+        int actionToTake = x;
+        clear = true;
+    }
 }