Add missing header text

Signed-off-by: Pekka Helenius <fincer89@hotmail.com>

bookstore/src/main/java/com/fjordtek/bookstore/model/Author.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import java.util.List;

bookstore/src/main/java/com/fjordtek/bookstore/model/AuthorJsonSerializer.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import java.io.IOException;

bookstore/src/main/java/com/fjordtek/bookstore/model/AuthorRepository.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import java.util.List;

bookstore/src/main/java/com/fjordtek/bookstore/model/BookHash.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import java.security.SecureRandom;

bookstore/src/main/java/com/fjordtek/bookstore/model/BookHashRepository.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import org.springframework.data.jpa.repository.Modifying;

bookstore/src/main/java/com/fjordtek/bookstore/model/CategoryJsonSerializer.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.model;
 
 import java.io.IOException;

bookstore/src/main/java/com/fjordtek/bookstore/web/BookRestController.java

@@ -1,3 +1,5 @@
+//Pekka Helenius <fincer89@hotmail.com>, Fjordtek 2020
+
 package com.fjordtek.bookstore.web;
 
 import java.util.Optional;