hi....

Yes, if TasksEntryImpl.java do not extend TasksEntryModelImpl.java it will show error.
Because, the methods of TasksEntryModel.java is implemented by TasksEntryModelImpl.java. so there will be some unimplemented methods of TasksEntryModelImpl.java left out in TasksEntryImpl.java.
And we cannot implement those unimplented methods because TasksEntryModelImpl.java in turn extends BaseModelImpl<TasksEntry> and TasksEntry extends TasksEntryModel.java which in turn extends BaseModel<TasksEntry>. This will cause CloneNotSupportedException.

Hope i am correct. Please inform me if not so.

Thanks