Checkpoint - started to create database entities

buisnesslogic/src/main/java/com/plannaplan/services/GroupService.java

@@ -0,0 +1,12 @@
+package com.plannaplan.services;
+
+import com.plannaplan.repositories.GroupRepository;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class GroupService {
+    @Autowired
+    private GroupRepository repo;
+}