diff --git a/cc.kave.commons/src/main/java/cc/kave/commons/model/enums/Likert5Point.java b/cc.kave.commons/src/main/java/cc/kave/commons/model/enums/Likert5Point.java
new file mode 100644
index 0000000..f27e79f
--- /dev/null
+++ b/cc.kave.commons/src/main/java/cc/kave/commons/model/enums/Likert5Point.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2017 University of Zurich
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package cc.kave.commons.model.enums;
+
+public enum Likert5Point {
+    Unknown,
+    Negative2,
+    Negative1,
+    Neutral,
+    Positive1,
+    Positive2
+}
diff --git a/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskAction.java b/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskAction.java
new file mode 100644
index 0000000..7a349eb
--- /dev/null
+++ b/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskAction.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2017 Nico Strebel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package cc.kave.commons.model.events.tasks;
+
+public enum TaskAction {
+    Create,
+    Activate,
+    Pause,
+    Complete,
+    Delete,
+    Edit,
+    Move,
+    UndoComplete
+}
diff --git a/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskEvent.java b/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskEvent.java
new file mode 100644
index 0000000..d089558
--- /dev/null
+++ b/cc.kave.commons/src/main/java/cc/kave/commons/model/events/tasks/TaskEvent.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2017 Nico Strebel
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package cc.kave.commons.model.events.tasks;
+
+import cc.kave.commons.model.enums.Likert5Point;
+import cc.kave.commons.model.events.IDEEvent;
+
+public class TaskEvent extends IDEEvent
+{
+    public String Version;
+    public String TaskId;
+    public TaskAction Action;
+    public String NewParentId;
+    public Likert5Point Annoyance;
+    public Likert5Point Importance;
+    public Likert5Point Urgency;
+}
\ No newline at end of file
diff --git a/cc.kave.commons/src/main/java/cc/kave/commons/utils/io/json/JsonUtils.java b/cc.kave.commons/src/main/java/cc/kave/commons/utils/io/json/JsonUtils.java
index 926e399..7676c37 100644
--- a/cc.kave.commons/src/main/java/cc/kave/commons/utils/io/json/JsonUtils.java
+++ b/cc.kave.commons/src/main/java/cc/kave/commons/utils/io/json/JsonUtils.java
@@ -25,6 +25,9 @@
 import java.util.Map;
 import java.util.Set;
 
+import cc.kave.commons.model.enums.Likert5Point;
+import cc.kave.commons.model.events.tasks.TaskAction;
+import cc.kave.commons.model.events.tasks.TaskEvent;
 import org.apache.commons.io.FileUtils;
 import org.apache.commons.io.IOUtils;
 
@@ -244,7 +247,9 @@ private static void registerEventHierarchy(GsonBuilder gb) {
 				WindowEvent.class,
 				// general
 				ActivityEvent.class, CommandEvent.class, ErrorEvent.class, InfoEvent.class, NavigationEvent.class,
-				NavigationType.class, SystemEvent.class, SystemEventType.class, EventTrigger.class };
+				NavigationType.class, SystemEvent.class, SystemEventType.class, EventTrigger.class,
+				// task events
+				TaskEvent.class, TaskAction.class, Likert5Point.class };
 
 		identifyHierarchiesAndRegisterAll(gb, eventsAndRelatedTypes);
 	}