diff --git a/op-api/op-api-system/src/main/java/com/op/system/api/domain/sap/SapRFW.java b/op-api/op-api-system/src/main/java/com/op/system/api/domain/sap/SapRFW.java
index 491981d4..e5100666 100644
--- a/op-api/op-api-system/src/main/java/com/op/system/api/domain/sap/SapRFW.java
+++ b/op-api/op-api-system/src/main/java/com/op/system/api/domain/sap/SapRFW.java
@@ -6,7 +6,6 @@ package com.op.system.api.domain.sap;
 public class SapRFW {
     private String aufnr;
     private String gamng;
-
     private lt_gs lt_gs;
     private lt_hw lt_hw;
 
@@ -43,7 +42,7 @@ public class SapRFW {
     }
 
 
-    public class lt_gs
+    public static class lt_gs
     {
         String conf_activity1;
         String conf_activity2;
@@ -113,12 +112,11 @@ public class SapRFW {
         }
 
     }
-    public class lt_hw{
+    public static class lt_hw{
+
         String material;
         String entry_qnt;
 
-
-
         public String getMaterial() {
             return material;
         }