Added BubbleSort as a Sorting Algorithm

Sorting Algorithms/BubbleSort.java

@@ -11,7 +11,7 @@ void bubbleSort(int arr[])
             for (int j = 0; j < n-i-1; j++)
                 if (arr[j] > arr[j+1])
                 {
-                    // swap arr[j+1] and arr[i]
+                    // swap arr[j+1] and arr[j]
                     int temp = arr[j];
                     arr[j] = arr[j+1];
                     arr[j+1] = temp;