do not allow competitor to be null in RegisterCompetitorEvent

java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/abstractlog/race/tracking/impl/RaceLogRegisterCompetitorEventImpl.java

@@ -12,17 +12,22 @@ import com.sap.sailing.domain.abstractlog.shared.events.impl.BaseRegisterCompeti
 import com.sap.sailing.domain.base.Competitor;
 import com.sap.sse.common.TimePoint;
 
-public class RaceLogRegisterCompetitorEventImpl extends BaseRegisterCompetitorEventImpl<RaceLogEventVisitor>
-implements RaceLogRegisterCompetitorEvent {
+public class RaceLogRegisterCompetitorEventImpl extends BaseRegisterCompetitorEventImpl<RaceLogEventVisitor> implements
+        RaceLogRegisterCompetitorEvent {
     private static final long serialVersionUID = -5114645637316367845L;
     private final RaceLogEventData raceLogEventData;
-    
+
+    /**
+     * @throws IllegalArgumentException
+     *             if {@code competitor} is null
+     */
     public RaceLogRegisterCompetitorEventImpl(TimePoint createdAt, AbstractLogEventAuthor author,
-            TimePoint logicalTimePoint, Serializable id, int passId, Competitor competitor) {
+            TimePoint logicalTimePoint, Serializable id, int passId, Competitor competitor)
+            throws IllegalArgumentException {
         super(createdAt, author, logicalTimePoint, id, competitor);
         this.raceLogEventData = new RaceLogEventDataImpl(null, passId);
     }
-    
+
     @Override
     public int getPassId() {
         return raceLogEventData.getPassId();

java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/abstractlog/regatta/events/impl/RegattaLogRegisterCompetitorEventImpl.java

@@ -10,11 +10,15 @@ import com.sap.sailing.domain.base.Competitor;
 import com.sap.sse.common.TimePoint;
 
 public class RegattaLogRegisterCompetitorEventImpl extends BaseRegisterCompetitorEventImpl<RegattaLogEventVisitor>
-implements RegattaLogRegisterCompetitorEvent {
+        implements RegattaLogRegisterCompetitorEvent {
     private static final long serialVersionUID = -5114645637316367845L;
-    
+
+    /**
+     * @throws IllegalArgumentException
+     *             if {@code competitor} is null
+     */
     public RegattaLogRegisterCompetitorEventImpl(TimePoint createdAt, AbstractLogEventAuthor author,
-            TimePoint logicalTimePoint, Serializable id, Competitor competitor) {
+            TimePoint logicalTimePoint, Serializable id, Competitor competitor) throws IllegalArgumentException {
         super(createdAt, author, logicalTimePoint, id, competitor);
     }
 

java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/abstractlog/shared/events/impl/BaseRegisterCompetitorEventImpl.java

@@ -8,21 +8,28 @@ import com.sap.sailing.domain.abstractlog.shared.events.RegisterCompetitorEvent;
 import com.sap.sailing.domain.base.Competitor;
 import com.sap.sse.common.TimePoint;
 
-public abstract class BaseRegisterCompetitorEventImpl<VisitorT> extends AbstractLogEventImpl<VisitorT>
-implements RegisterCompetitorEvent<VisitorT> {
+public abstract class BaseRegisterCompetitorEventImpl<VisitorT> extends AbstractLogEventImpl<VisitorT> implements
+        RegisterCompetitorEvent<VisitorT> {
     private static final long serialVersionUID = -30864810737555657L;
     private final Competitor competitor;
-    
-    public BaseRegisterCompetitorEventImpl(TimePoint createdAt, AbstractLogEventAuthor author, TimePoint logicalTimePoint,
-            Serializable pId, Competitor competitor) {
+
+    /**
+     * @throws IllegalArgumentException
+     *             if {@code competitor} is null
+     */
+    public BaseRegisterCompetitorEventImpl(TimePoint createdAt, AbstractLogEventAuthor author,
+            TimePoint logicalTimePoint, Serializable pId, Competitor competitor) throws IllegalArgumentException {
         super(createdAt, author, logicalTimePoint, pId);
+        if (competitor == null) {
+            throw new IllegalArgumentException("Competitor may not be null");
+        }
         this.competitor = competitor;
     }
 
     @Override
     public Competitor getCompetitor() {
         return competitor;
-    } 
+    }
 
     @Override
     public String getShortInfo() {