@@ -0,0 +1,422 @@
+package seedu.jobs.logic.commands;%0A%0A%0A/**%0A * Undo last commands which has modified the data.%0A */%0Apublic class UndoCommand extends Command %7B%0A%0A    public static final String COMMAND_WORD = %22undo%22;%0A%0A    public static final String MESSAGE_SUCCESS = %22Undo last command%22;%0A%0A%0A    @Override%0A    public CommandResult execute() %7B%0A        model.updateFilteredListToShowAll();%0A        return new CommandResult(MESSAGE_SUCCESS);%0A    %7D%0A%7D%0A

Add undo command