diff --git a/ean/encoder.go b/ean/encoder.go
index f3a1919..f7e674b 100644
--- a/ean/encoder.go
+++ b/ean/encoder.go
@@ -1,3 +1,4 @@
+// package for EAN barcode generation.
 package ean
 
 import (
diff --git a/qr/encoder.go b/qr/encoder.go
index 901d687..4b7d4ab 100644
--- a/qr/encoder.go
+++ b/qr/encoder.go
@@ -1,3 +1,4 @@
+// package for QR barcode generation.
 package qr
 
 import (