Fixed driver-name logging

engine.go

@@ -240,7 +240,7 @@ func (engine *Engine) Close() error {
 func (engine *Engine) Ping() error {
 	session := engine.NewSession()
 	defer session.Close()
-	engine.logger.Info("PING DATABASE", engine.DriverName)
+	engine.logger.Infof("PING DATABASE %v", engine.DriverName())
 	return session.Ping()
 }