XF 2.1 Working with transactions/rollback and entity finder?

[asprin]

I've the following code in my addon's controller

$finder = \XF::finder('Asprin\FB:Foo')->where('sys_id', 123); // can return multiple rows
$foos = $finder->fetch();
if($finder->total() > 0)
{
    foreach($foos as $foo)
    {
        $foo->delete();
    }
}

$finder2 = \XF::finder('Asprin\FB:Bar')->where('sys_id', 456); // can return multiple rows
$bars = $finder2->fetch();
if($finder2->total() > 0)
{
    foreach($bars as $bar)
    {
        $bar->delete();
    }
}

Though the chances of this happening is almost nil, still how do I ensure that in the event any one of the $foo or $bar does not delete, a rollback should kick in? Can the transaction begin/commit be applied here?