diff --git a/src/main/java/com/example/cosmos_serversb/models/SessionManager.java b/src/main/java/com/example/cosmos_serversb/models/SessionManager.java
index d0595c1..dafe635 100644
--- a/src/main/java/com/example/cosmos_serversb/models/SessionManager.java
+++ b/src/main/java/com/example/cosmos_serversb/models/SessionManager.java
@@ -35,9 +35,15 @@
     }
 
     public static void closeSession(){
-        session.getTransaction().commit();
-        session.close();
-        session = null;
+        if(session != null) {
+            session.getTransaction().commit();
+            session.close();
+            session = null;
+        }
+    }
+
+    public static SessionFactory getSessionFactory(){
+        return sessionFactory;
     }
 
 
@@ -66,8 +72,4 @@
         }
     }
 
-    public static SessionFactory getSessionFactory(){
-        return sessionFactory;
-    }
-
 }