1 files changed, 4 insertions, 0 deletions
diff --git a/src/main/java/at/gv/egiz/moazs/scheme/Marshaller.java b/src/main/java/at/gv/egiz/moazs/scheme/Marshaller.java
index 83ace5c..1a86079 100644
--- a/src/main/java/at/gv/egiz/moazs/scheme/Marshaller.java
+++ b/src/main/java/at/gv/egiz/moazs/scheme/Marshaller.java
@@ -32,6 +32,10 @@ public class Marshaller {
     }
 
     public <T> String marshallXml(final T obj) {
+        if (obj == null) {
+            return "null";
+        }
+
         StringWriter sw = new StringWriter();
         Result result = new StreamResult(sw);
         jaxbMarshaller.marshal(obj, result);