diff --git a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/FooDao.java b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/FooDao.java
index a497d14dd4..a59bb30f48 100644
--- a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/FooDao.java
+++ b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/FooDao.java
@@ -3,7 +3,7 @@ package org.baeldung.spring.persistence.dao;
 import org.springframework.stereotype.Repository;
 
 @Repository
-public class FooDao {
+public class FooDao implements IFooDao {
 
     public FooDao() {
         super();
diff --git a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/IFooDao.java b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/IFooDao.java
new file mode 100644
index 0000000000..91d44f5f6b
--- /dev/null
+++ b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/dao/IFooDao.java
@@ -0,0 +1,5 @@
+package org.baeldung.spring.persistence.dao;
+
+public interface IFooDao {
+    //
+}
diff --git a/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/service/FooService.java b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/service/FooService.java
new file mode 100644
index 0000000000..cda31a0e86
--- /dev/null
+++ b/spring-hibernate-dao/src/main/java/org/baeldung/spring/persistence/service/FooService.java
@@ -0,0 +1,19 @@
+package org.baeldung.spring.persistence.service;
+
+import org.baeldung.spring.persistence.dao.IFooDao;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class FooService {
+
+    @Autowired
+    private IFooDao fooDao;
+
+    public FooService() {
+        super();
+    }
+
+    // API
+
+}