Fix uom datatype

src/main/java/org/citygml4j/ade/energy3/bind/EnergyADEMarshaller.java

@@ -914,7 +914,7 @@ public class EnergyADEMarshaller implements ADEMarshaller {
 
         if (src.isSetUom()) {
             UnitOfMeasureType uom = new UnitOfMeasureType();
-            uom.setUom(src.getUom());
+            uom.setUom(src.getUom().getUom());
             dest.setUom(uom);
         }
 

src/main/java/org/citygml4j/ade/energy3/bind/EnergyADEUnmarshaller.java

@@ -729,7 +729,9 @@ public class EnergyADEUnmarshaller implements ADEUnmarshaller {
         try {
 
             if (src.isSetUom()) {
-                dest.setUom(src.getUom().toString());
+                UnitOfMeasure unitOfMeasure = new UnitOfMeasure();
+                unitOfMeasure.setUom(src.getUom().getUom());
+                dest.setUom(unitOfMeasure);
             }
 
             if (src.isSetTemporalExtent()) {