[JAVA-13264] Add missing classes

spring-di-2/src/main/java/com/baeldung/constructordi/service/UserRepository.java

@@ -0,0 +1,7 @@
+package com.baeldung.constructordi.service;
+
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class UserRepository {
+}

spring-di-2/src/main/java/com/baeldung/constructordi/service/UserService.java

@@ -0,0 +1,11 @@
+package com.baeldung.constructordi.service;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class UserService {
+
+    @Autowired
+    private UserRepository userRepository;
+}