diff --git a/src/main/java/org/ntlab/citrusserver/repositories/BookManager.java b/src/main/java/org/ntlab/citrusserver/repositories/BookManager.java
new file mode 100644
index 0000000..b371ae5
--- /dev/null
+++ b/src/main/java/org/ntlab/citrusserver/repositories/BookManager.java
@@ -0,0 +1,4 @@
+package org.ntlab.citrusserver.repositories;
+
+public class BookManager {
+}