diff --git a/core/c/mysql.php b/core/c/mysql.php
index 88bad66..8c7fe0d 100755
--- a/core/c/mysql.php
+++ b/core/c/mysql.php
@@ -47,7 +47,11 @@ class Mysql implements IMysql
         }
 	}
 
-	public static function getInstance( $section = false )
+    /**
+     * @param false $section
+     * @return Mysql
+     */
+	public static function getInstance( $section = false ): Mysql
 	{
 		$className = get_called_class();
 		if(self::$_instance==null) self::$_instance = new $className( $section );
@@ -150,10 +154,10 @@ class Mysql implements IMysql
 		$this->_dbname = $dbname;
 	}
 
-	/**
-	 * @return string
-	 */
-	protected function getConn()
+    /**
+     * @return \PDO
+     */
+	public function getConn(): \PDO
 	{
 		return $this->_conn;
 	}
diff --git a/core/c/odbc.php b/core/c/odbc.php
index 18f74ec..a8728f0 100755
--- a/core/c/odbc.php
+++ b/core/c/odbc.php
@@ -46,7 +46,7 @@ class Odbc extends Mysql implements IOdbc
 
     }
 
-    public static function getInstance( $section = false )
+    public static function getInstance( $section = false ): Mysql
     {
         $className = get_called_class();
         if(self::$_instance==null) self::$_instance = new $className( $section );
diff --git a/core/c/psql.php b/core/c/psql.php
index 6b621eb..3f58c8d 100644
--- a/core/c/psql.php
+++ b/core/c/psql.php
@@ -7,7 +7,7 @@ namespace Nibiru;
  * Time: 11:02
  */
 
-class Psql extends Mysql implements IPsql
+class Psql implements IPsql
 {
     use Messages;
 
@@ -45,7 +45,7 @@ class Psql extends Mysql implements IPsql
         }
     }
 
-    public static function getInstance( $section = false )
+    public static function getInstance( $section = false ): Psql
     {
         $className = get_called_class();
         if(self::$_instance==null) self::$_instance = new $className( $section );