@@ -0,0 +1,563 @@
+package seedu.address.commons.events.model;%0A%0Aimport seedu.address.commons.events.BaseEvent;%0Aimport seedu.address.model.ReadOnlyTaskManager;%0A%0A/** Indicates the TaskManager in the model has changed*/%0Apublic class TaskManagerChangedEvent extends BaseEvent %7B%0A%0A    public final ReadOnlyTaskManager data;%0A%0A    public TaskManagerChangedEvent(ReadOnlyTaskManager data) %7B%0A        this.data = data;%0A    %7D%0A%0A    @Override%0A    public String toString() %7B%0A        return %22number of persons %22 + data.getTaskList().size() + %22, number of tags %22 + data.getTagList().size();%0A    %7D%0A%7D%0A

Add TaskManagerChangedEvent class