Major refactor of reading from excel to db

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

@@ -1,5 +1,7 @@
 package com.plannaplan.services;
 
+import java.util.Optional;
+
 import com.plannaplan.entities.Lecturer;
 import com.plannaplan.repositories.LecturerRepository;
 
@@ -11,19 +13,20 @@ public class LecturerService {
     @Autowired
     private LecturerRepository repo;
 
-    public Lecturer getLecturer(String title, String name, String surname) {
+    public Optional<Lecturer> getLecturer(String title, String name, String surname) {
         return repo.find(title, name, surname);
     }
 
-    public void save(Lecturer lecturer) {
+    public Lecturer save(Lecturer lecturer) {
         repo.save(lecturer);
+        return lecturer;
     }
 
     public void delete(Lecturer lecturer) {
         repo.delete(lecturer);
     }
 
-    public int getLecturersAmmount(){
-        return (int)this.repo.count();
+    public int getLecturersAmmount() {
+        return (int) this.repo.count();
     }
 }