finished up boilerplate

src/main/java/com/StudentServices/MarksService/controller/MarksController.java

 package com.StudentServices.MarksService.controller;
 
+import com.StudentServices.MarksService.service.StudentService;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
@@ -11,4 +13,6 @@ import org.springframework.web.bind.annotation.RestController;
 
 public class MarksController {
 
+    @Autowired StudentService studentService;
+
 }

src/main/java/com/StudentServices/MarksService/repository/StudentRepository.java

 package com.StudentServices.MarksService.repository;
 
-public interface StudentRepository {
+import com.StudentServices.MarksService.model.Student;
+import org.springframework.data.mongodb.repository.MongoRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface StudentRepository extends MongoRepository <Student, String> {
 }

src/main/java/com/StudentServices/MarksService/service/StudentService.java

 package com.StudentServices.MarksService.service;
 
+
+import com.StudentServices.MarksService.repository.StudentRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
 public class StudentService {
+
+    @Autowired StudentRepository studentRepository;
+
 }