diff --git a/Back/skydiveLogs-api.Business/AircraftService.cs b/Back/skydiveLogs-api.Business/AircraftService.cs
index 76ab374..3258b08 100644
--- a/Back/skydiveLogs-api.Business/AircraftService.cs
+++ b/Back/skydiveLogs-api.Business/AircraftService.cs
@@ -17,7 +17,7 @@ namespace skydiveLogs_api.Business
 
         public void AddNewAircraft(Aircraft newAircraft)
         {
-            _aircraftRepository.AddAircraft(newAircraft);
+            _aircraftRepository.Add(newAircraft);
         }
 
         public void DeleteAircraftById(int id)
diff --git a/Back/skydiveLogs-api.Business/DropZoneService.cs b/Back/skydiveLogs-api.Business/DropZoneService.cs
index 37b0136..c7f91b8 100644
--- a/Back/skydiveLogs-api.Business/DropZoneService.cs
+++ b/Back/skydiveLogs-api.Business/DropZoneService.cs
@@ -15,9 +15,9 @@ namespace skydiveLogs_api.Business
             _dropZoneRepository = dropZoneRepository;
         }
 
-        public void AddNewDz(DropZone dropZone)
+        public void AddNewDz(DropZone newdropZone)
         {
-            throw new NotImplementedException();
+            _dropZoneRepository.Add(newdropZone);
         }
 
         public void DeleteDzById(int id)
diff --git a/Back/skydiveLogs-api.Business/GearService.cs b/Back/skydiveLogs-api.Business/GearService.cs
index e0f56ee..8668997 100644
--- a/Back/skydiveLogs-api.Business/GearService.cs
+++ b/Back/skydiveLogs-api.Business/GearService.cs
@@ -15,9 +15,9 @@ namespace skydiveLogs_api.Business
             _gearRepository = gearRepository;
         }
 
-        public void AddNewGear(Gear Gear)
+        public void AddNewGear(Gear newGear)
         {
-            throw new NotImplementedException();
+            _gearRepository.Add(newGear);
         }
 
         public void DeleteGearById(int id)
diff --git a/Back/skydiveLogs-api.Business/JumpService.cs b/Back/skydiveLogs-api.Business/JumpService.cs
index feb7911..23017f7 100644
--- a/Back/skydiveLogs-api.Business/JumpService.cs
+++ b/Back/skydiveLogs-api.Business/JumpService.cs
@@ -39,7 +39,7 @@ namespace skydiveLogs_api.Business
             jump.DropZone = selectedDropZone;
             jump.Gear = selectedGear;
 
-            _jumpRepository.AddJump(jump);
+            _jumpRepository.Add(jump);
         }
 
         public void DeleteJumpById(int id)
diff --git a/Back/skydiveLogs-api.Business/JumpTypeService.cs b/Back/skydiveLogs-api.Business/JumpTypeService.cs
index b16f499..0afda55 100644
--- a/Back/skydiveLogs-api.Business/JumpTypeService.cs
+++ b/Back/skydiveLogs-api.Business/JumpTypeService.cs
@@ -15,9 +15,9 @@ namespace skydiveLogs_api.Business
             _jumpTypeRepository = jumpTypeRepository;
         }
 
-        public void AddNewJumpType(JumpType value)
+        public void AddNewJumpType(JumpType newJumpType)
         {
-            throw new NotImplementedException();
+            _jumpTypeRepository.Add(newJumpType);
         }
 
         public void DeleteJumpTypeById(int id)