initial service work

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();

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 {
+    //
+}

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
+
+}