diff --git a/handler/handler.go b/handler/handler.go
index 3fbdfd6..1bc202e 100644
--- a/handler/handler.go
+++ b/handler/handler.go
@@ -8,6 +8,7 @@ type IHandler interface {
 	DomainLoop(domain *godns.Domain, panicChan chan<- godns.Domain)
 }
 
+// CreateHandler creates dns handler by different providers
 func CreateHandler(provider string) IHandler {
 	var handler IHandler
 
diff --git a/handler/he_handler.go b/handler/he_handler.go
index 5ce6dd1..69a755c 100644
--- a/handler/he_handler.go
+++ b/handler/he_handler.go
@@ -25,6 +25,7 @@ type HEHandler struct {
 	Configuration *godns.Settings
 }
 
+// SetConfiguration pass dns settings and store it to handler instance
 func (handler *HEHandler) SetConfiguration(conf *godns.Settings) {
 	handler.Configuration = conf
 }