feat(Battleship): added exceptions module for errors

Author: ca20110820

projects/Battleship/exceptions.py

@@ -0,0 +1,18 @@
+class BattleshipException(Exception):
+    """Base Class for Battleship Exceptions"""
+
+
+class InvalidShipCoordinateException(BattleshipException):
+    """Raises error when a ship's coordinates are invalid."""
+
+
+class InvalidHitMoveException(BattleshipException):
+    """Raises error when a player tries to give an invalid hit move coordinate."""
+
+
+class BoardException(BattleshipException):
+    """Base class for exceptions related to the game board."""
+
+
+class GameException(BattleshipException):
+    """Base class for general exceptions related to the Battleship game."""