diff --git a/backup/doc.go b/backup/doc.go
new file mode 100644
index 000000000..8dbec375a
--- /dev/null
+++ b/backup/doc.go
@@ -0,0 +1,2 @@
+// Package backup implements backup engine for files and directories.
+package backup
diff --git a/vault/doc.go b/vault/doc.go
index f7e34c8a3..c8663a4e5 100644
--- a/vault/doc.go
+++ b/vault/doc.go
@@ -1 +1,2 @@
+// Package vault implements vault for securely storing object IDs and other sensitive data protected with a password or a key.
 package vault
diff --git a/vfs/doc.go b/vfs/doc.go
new file mode 100644
index 000000000..8fb512fb7
--- /dev/null
+++ b/vfs/doc.go
@@ -0,0 +1,2 @@
+// Package vfs implements FUSE filesystem interface based on files and directories stored in a repository.
+package vfs