Create custom exception.

Author: BONNe

src/main/java/main/elements/PolygonElement.java

@@ -59,8 +59,7 @@ public PolygonElement(List<Point2D> pointList, Color backgroundColor, Color bord
 	{
 		if (pointList.size() < 3)
 		{
-			// TODO Probably need to create Exceptions?
-			throw new ArrayIndexOutOfBoundsException("Too small pointList");
+			throw new CustomException("Point list is too small. It must contains at least 3 points!");
 		}
 
 		this.pointList = pointList;
@@ -185,6 +184,23 @@ public void setPosition(Point2D position)
 	}
 
 
+// ---------------------------------------------------------------------
+// Section: Private Classes
+// ---------------------------------------------------------------------
+
+
+	/**
+	 * This custom Exception throw message when Polygon point list is too small.
+	 */
+	private class CustomException extends RuntimeException
+	{
+		public CustomException(String message)
+		{
+			super(message, new Throwable(message), true, true);
+		}
+	}
+
+
 // ---------------------------------------------------------------------
 // Section: Variables
 // ---------------------------------------------------------------------