Added salting method

src/main/java/dao/UserDAO.java

@@ -183,7 +183,11 @@ public class UserDAO {
      * @return a random salt
      */
     public byte[] generateSalt() {
-        return null;
+    SecureRandom random = new SecureRandom();
+    byte bytes[] = new byte[16];
+    bytes = random.nextBytes(bytes);
+        
+    return bytes;
     }
 
     /**

src/test/java/UserDAOTest.java

@@ -194,4 +194,13 @@ public class UserDAOTest extends JerseyTest {
         assertEquals(expectedUsername,actualUsername);
         assertNotEquals(beforeNewUser,afterNewUser);
     }
+
+    @Test
+    public void testSalt () {
+        String password = "passord";
+        byte salted1[] = userDAO.generateSalt(password);
+        byte salted2[] = userDAO.generateSalt(password);
+
+        assertNotEquals(salted1, salted2);
+    }
 }
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