diff --git a/album.go b/album.go
index b1b6847..97bac7c 100644
--- a/album.go
+++ b/album.go
@@ -13,6 +13,9 @@ import (
 // An AlbumState describe the state of an Album
 type AlbumState int
 
+// An AlbumID uniquely identifies an Album both here and www.bedetheque.com
+type AlbumID uint64
+
 const (
 	// NEW is "État neuf" state
 	NEW AlbumState = iota // 0
@@ -31,7 +34,7 @@ const (
 // This is basically the data we store on bdgest.com, and that we want
 // in our system to be retrieve from
 type Album struct {
-	ID     uint64
+	ID     AlbumID
 	ISBN   string
 	Series string
 	Title  string
diff --git a/album_csv_reader.go b/album_csv_reader.go
index af85d29..e90959a 100644
--- a/album_csv_reader.go
+++ b/album_csv_reader.go
@@ -85,7 +85,7 @@ func (r *AlbumCsvReader) Read() (*Album, error) {
 	if err != nil {
 		return nil, fmt.Errorf("AlbumCsvReader: %s: %s", cID, err)
 	}
-	res.ID = uint64(ID)
+	res.ID = AlbumID(ID)
 
 	if len(data[r.columns[cNum]]) == 0 {
 		res.Num = -1
diff --git a/album_description_cache.go b/album_description_cache.go
new file mode 100644
index 0000000..5be885b
--- /dev/null
+++ b/album_description_cache.go
@@ -0,0 +1,17 @@
+package main
+
+import "fmt"
+
+// An AlbumDescriptionCache is used to fetch and cache AlbumDescription from www.bedetheque.com
+type AlbumDescriptionCache struct {
+}
+
+// NewAlbumDescriptionCache is creating a new album description at specified location
+func NewAlbumDescriptionCache(filepath string) (*AlbumDescriptionCache, error) {
+	return nil, fmt.Errorf("Not yet implemented")
+}
+
+// GetDescription retrieves from the cache or either from www.bedetheque.com the AlbumDescription of an album
+func (c *AlbumDescriptionCache) GetDescription(ID AlbumID) (*AlbumDescription, error) {
+	return nil, fmt.Errorf("Not yet implemented")
+}
diff --git a/album_description_cache_test.go b/album_description_cache_test.go
new file mode 100644
index 0000000..7ddfca5
--- /dev/null
+++ b/album_description_cache_test.go
@@ -0,0 +1,10 @@
+package main
+
+import . "gopkg.in/check.v1"
+
+type AlbumDescriptionCacheSuite struct{}
+
+var _ = Suite(&AlbumDescriptionCacheSuite{})
+
+func (s *AlbumDescriptionCacheSuite) TestCanFetchCache(c *C) {
+}
diff --git a/main.go b/main.go
index 0a2b4fa..e35fb1d 100644
--- a/main.go
+++ b/main.go
@@ -49,7 +49,7 @@ func Execute() error {
 		if err != nil {
 			return err
 		}
-		a.ID = uint64(ID)
+		a.ID = AlbumID(ID)
 		// ISBN
 		a.ISBN = data[1]
 		// Series