Made the rest of the db classes abstract \n
except for the DB_cache class, because I'm not sure if it is directly called
diff --git a/system/database/DB_result.php b/system/database/DB_result.php
index c3cdd24..d0205e0 100644
--- a/system/database/DB_result.php
+++ b/system/database/DB_result.php
@@ -36,7 +36,7 @@
* @author EllisLab Dev Team
* @link http://codeigniter.com/user_guide/database/
*/
-class CI_DB_result {
+abstract class CI_DB_result {
public $conn_id = NULL;
public $result_id = NULL;