diff --git a/src/main/java/org/folio/sample/controller/BookController.java b/src/main/java/org/folio/sample/controller/BookController.java
index 99e4428..eebb18a 100644
--- a/src/main/java/org/folio/sample/controller/BookController.java
+++ b/src/main/java/org/folio/sample/controller/BookController.java
@@ -76,7 +76,8 @@ public ResponseEntity<BookDTO> getBook(UUID bookId) {
       HttpStatus.OK
     );
   }
-
+  /** {@inheritDoc} */
+  @Override
   public ResponseEntity<BookDTO> updateBook(UUID bookId, BookForCreationDTO newBook) {
     log.info("Called PUT /books/{}", bookId);
 
@@ -85,7 +86,8 @@ public ResponseEntity<BookDTO> updateBook(UUID bookId, BookForCreationDTO newBoo
       HttpStatus.OK
     );
   }
-
+  /** {@inheritDoc} */
+  @Override
   public ResponseEntity<List<BookDTO>> getAllAvailable() {
     log.info("Called GET /books/available");