Custom database not created

<?php
/**
 * @package storefinder
 */
$base_path = !empty($base_path) ? $base_path : $modx->getOption('core_path').'components/storefinder/';
$modx->addPackage('storefinder',$base_path.'model/');

$store = $modx->newObject('sfStore');
$store->fromArray(array(
    'name' => 'Store 1',
    'address' => '12 Grimmauld Place',
    'city' => 'London',
    'country' => 'England',
    'zip' => '12345',
    'phone' => '555-2134-543',
));
$store->save();
 
$store = $modx->newObject('sfStore');
$store->fromArray(array(
    'name' => 'Store 2',
    'address' => '4 Privet Drive',
    'city' => 'London',
    'country' => 'England',
    'zip' => '53491',
    'phone' => '555-2011-978',
));
$store->save();

$stores = $modx->getCollection('sfStore');
echo 'Total: '.count($stores);

<?xml version="1.0" encoding="UTF-8"?>
<model package="storefinder" baseClass="xPDOObject" platform="mysql" defaultEngine="MyISAM" phpdoc-package="storefinder" phpdoc-subpackage="model">
<object class="sfStore" table="sfinder_stores" extends="xPDOSimpleObject">
<field key="name" dbtype="varchar" precision="100" phptype="string" null="false" default="" index="index"/>
<field key="address" dbtype="varchar" precision="255" phptype="string" null="false" default=""/>
<field key="city" dbtype="varchar" precision="255" phptype="string" null="false" default=""/>
<field key="state" dbtype="varchar" precision="255" phptype="string" null="false" default=""/>
<field key="zip" dbtype="varchar" precision="10" phptype="string" null="false" default="0" index="index"/>
<field key="country" dbtype="varchar" precision="20" phptype="string" null="false" default=""/>
<field key="phone" dbtype="varchar" precision="20" phptype="string" null="false" default=""/>
<field key="fax" dbtype="varchar" precision="20" phptype="string" null="false" default=""/>
</object>
</model>

<?php
$table = 'sfStore';
$m = $modx->getManager();
$created = $m->createObjectContainer($table);
return $created ? "Table created: $table" : "Table not created: $table";

$base_path = !empty($base_path) ? $base_path : $modx->getOption('core_path').'components/storefinder/';
$modx->addPackage('storefinder',$base_path.'model/');