1 files changed, 3 insertions, 2 deletions
diff --git a/src/org/traccar/database/SimpleObjectManager.java b/src/org/traccar/database/SimpleObjectManager.java
index fa41f30b6..0b4d11378 100644
--- a/src/org/traccar/database/SimpleObjectManager.java
+++ b/src/org/traccar/database/SimpleObjectManager.java
@@ -28,11 +28,12 @@ import org.traccar.model.BaseModel;
 import org.traccar.model.Permission;
 import org.traccar.model.User;
 
-public abstract class SimpleObjectManager extends BaseObjectManager implements ManagableObjects {
+public abstract class SimpleObjectManager<T extends BaseModel> extends BaseObjectManager<T>
+        implements ManagableObjects {
 
     private Map<Long, Set<Long>> userItems;
 
-    protected SimpleObjectManager(DataManager dataManager, Class<? extends BaseModel> baseClass) {
+    protected SimpleObjectManager(DataManager dataManager, Class<T> baseClass) {
         super(dataManager, baseClass);
     }