diff --git a/include/dba.php b/include/dba.php
index f3af9e7c32..76791911a3 100644
--- a/include/dba.php
+++ b/include/dba.php
@@ -10,6 +10,7 @@ require_once('include/datetime.php');
  * When logging, all binary info is converted to text and html entities are escaped so that
  * the debugging stream is safe to view within both terminals and web pages.
  *
+ * This class is for the low level database stuff that does driver specific things.
  */
 
 class dba {
diff --git a/include/dbm.php b/include/dbm.php
index 34cbcad3a2..3430577da6 100644
--- a/include/dbm.php
+++ b/include/dbm.php
@@ -2,6 +2,7 @@
 /**
  * @brief This class contain functions for the database management
  *
+ * This class contains functions that doesn't need to know if pdo, mysqli or whatever is used.
  */
 class dbm {
 	/**