diff --git a/stats/channels.go b/stats/channels.go
index bd9d9fb..f7317db 100644
--- a/stats/channels.go
+++ b/stats/channels.go
@@ -68,6 +68,7 @@ func EgressTraffic(traffic int) {
 	}
 }
 
+// GetStats returns a snapshot of Stats instance.
 func GetStats() Stats {
 	rpcChan := make(chan Stats)
 	statsChan <- rpcChan
diff --git a/stats/init.go b/stats/init.go
index 3fb206a..7b43a28 100644
--- a/stats/init.go
+++ b/stats/init.go
@@ -6,6 +6,7 @@ import (
 	"github.com/9seconds/mtg/config"
 )
 
+// Init initializes stats subsystem.
 func Init(conf *config.Config) error {
 	if conf.StatsD.Enabled {
 		client, err := newStatsd(conf)
diff --git a/stats/stats.go b/stats/stats.go
index e9c5999..686163d 100644
--- a/stats/stats.go
+++ b/stats/stats.go
@@ -89,6 +89,7 @@ func (s speed) MarshalJSON() ([]byte, error) {
 	return json.Marshal(value)
 }
 
+// Stats represents a statistics of the proxy.
 type Stats struct {
 	URLs        config.IPURLs `json:"urls"`
 	Connections connections   `json:"connections"`
@@ -165,6 +166,7 @@ func (s *Stats) handleCrash() {
 	s.Crashes++
 }
 
+// NewStats creates a new instance of Stats structure.
 func NewStats(conf *config.Config) *Stats {
 	return &Stats{
 		URLs:   conf.GetURLs(),