Added test for CargoUpdater

dddsample/tracking/core/src/main/java/se/citerus/dddsample/tracking/core/domain/model/cargo/Cargo.java

   }
 
   /**
-   * @return
+   * @return Most recent handling activity, or null if never handled.
    */
   public HandlingActivity mostRecentHandlingActivity() {
     return delivery.mostRecentHandlingActivity();

dddsample/tracking/core/src/test/java/se/citerus/dddsample/tracking/core/application/event/ItineraryUpdaterTest.java

+package se.citerus.dddsample.tracking.core.application.event;
+
+import org.junit.Test;
+
+public class ItineraryUpdaterTest {
+
+  ItineraryUpdater itineraryUpdater;
+
+  @Test
+  public void something() {
+  }
+  
+}