Add manager methods

src/main/java/ru/ulstu/manager/repository/ManagerRepository.java

@@ -0,0 +1,7 @@
+package ru.ulstu.manager.repository;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import ru.ulstu.manager.model.Manager;
+
+public interface ManagerRepository extends JpaRepository<Manager, Integer> {
+}

src/main/java/ru/ulstu/manager/service/ManagerService.java

@@ -0,0 +1,20 @@
+package ru.ulstu.manager.service;
+
+import org.springframework.stereotype.Service;
+import ru.ulstu.manager.model.Manager;
+import ru.ulstu.manager.repository.ManagerRepository;
+
+import java.util.List;
+
+@Service
+public class ManagerService {
+    private final ManagerRepository managerRepository;
+
+    public ManagerService(ManagerRepository managerRepository) {
+        this.managerRepository = managerRepository;
+    }
+
+    public List<Manager> getManagers() {
+        return managerRepository.findAll();
+    }
+}