--- a/flys-artifacts/src/main/java/de/intevation/flys/collections/CollectionDescriptionHelper.java	Tue Sep 18 09:49:45 2012 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/collections/CollectionDescriptionHelper.java	Tue Sep 18 10:18:30 2012 +0000
@@ -6,18 +6,16 @@
 
 import javax.xml.xpath.XPathConstants;
 
+import org.apache.log4j.Logger;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
 import org.w3c.dom.Node;
 import org.w3c.dom.NodeList;
 
-import org.apache.log4j.Logger;
-
 import de.intevation.artifacts.ArtifactDatabase;
 import de.intevation.artifacts.ArtifactDatabaseException;
 import de.intevation.artifacts.ArtifactNamespaceContext;
 import de.intevation.artifacts.CallContext;
-
 import de.intevation.artifacts.common.utils.XMLUtils;
 import de.intevation.artifacts.common.utils.XMLUtils.ElementCreator;
 
@@ -63,20 +61,17 @@
         long        ttl,
         CallContext callContext
     ) {
-        this.name     = name;
-        this.uuid     = uuid;
-        this.creation = creation;
-        this.ttl      = ttl;
-        this.context  = callContext;
-        this.database = callContext.getDatabase();
+        this.name      = name;
+        this.uuid      = uuid;
+        this.creation  = creation;
+        this.ttl       = ttl;
+        this.context   = callContext;
+        this.database  = callContext.getDatabase();
+        this.artifacts = new ArrayList<String>();
     }
 
 
     public void addArtifact(String uuid) {
-        if (artifacts == null) {
-            artifacts = new ArrayList<String>();
-        }
-
         if (uuid != null && uuid.length() > 0) {
             artifacts.add(uuid);
         }
@@ -197,10 +192,12 @@
 
 
     protected void appendAttribute(Element root) {
-        Document owner = root.getOwnerDocument();
-        Document attr  = attribute.toXML();
+        if (attribute != null) {
+            Document owner = root.getOwnerDocument();
+            Document attr  = attribute.toXML();
 
-        root.appendChild(owner.importNode(attr.getFirstChild(), true));
+            root.appendChild(owner.importNode(attr.getFirstChild(), true));
+        }
     }
 }
 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :