diff --git a/assetconnection/opcua/src/main/java/de/fraunhofer/iosb/ilt/faaast/service/assetconnection/opcua/conversion/ValueConverter.java b/assetconnection/opcua/src/main/java/de/fraunhofer/iosb/ilt/faaast/service/assetconnection/opcua/conversion/ValueConverter.java
index 0de12c30a..02a0fd5af 100644
--- a/assetconnection/opcua/src/main/java/de/fraunhofer/iosb/ilt/faaast/service/assetconnection/opcua/conversion/ValueConverter.java
+++ b/assetconnection/opcua/src/main/java/de/fraunhofer/iosb/ilt/faaast/service/assetconnection/opcua/conversion/ValueConverter.java
@@ -63,6 +63,7 @@ public Variant convert(TypedValue<?> value, NodeId targetType) throws ValueConve
             }
         });
         register(Datatype.DURATION, Identifiers.Double, new OpcUaToAasValueConverter() {
+            @Override
             public TypedValue<?> convert(Variant value, Datatype targetType) throws ValueConversionException {
                 if (Objects.isNull(value) || value.isNull()) {
                     return null;
@@ -78,11 +79,13 @@ public TypedValue<?> convert(Variant value, Datatype targetType) throws ValueCon
             }
         });
         register(Datatype.HEX_BINARY, Identifiers.ByteString, new OpcUaToAasValueConverter() {
+            @Override
             public TypedValue<?> convert(Variant value, Datatype targetType) throws ValueConversionException {
                 return convertByteString(value, targetType);
             }
         });
         register(Datatype.BASE64_BINARY, Identifiers.ByteString, new OpcUaToAasValueConverter() {
+            @Override
             public TypedValue<?> convert(Variant value, Datatype targetType) throws ValueConversionException {
                 return convertByteString(value, targetType);
             }