diff --git a/core/lib/Thelia/Install/Database.php b/core/lib/Thelia/Install/Database.php
index cefd3ef65..b17f693ee 100644
--- a/core/lib/Thelia/Install/Database.php
+++ b/core/lib/Thelia/Install/Database.php
@@ -23,6 +23,10 @@
 
 namespace Thelia\Install;
 
+use Propel\Runtime\Connection\ConnectionWrapper;
+use Propel\Runtime\Propel;
+use Propel\Runtime\ServiceContainer\ServiceContainerInterface;
+
 /**
  * Class Database
  * @package Thelia\Install
@@ -30,10 +34,33 @@ namespace Thelia\Install;
  */
 class Database
 {
-    public $connection;
+    /**
+     * @var \PDO
+     */
+    protected $connection;
 
-    public function __construct(\PDO $connection)
+    /**
+     * Create a new instance, using the provided connection information, either none for
+     * automatically a connection, a ConnectionWrapper instance or a PDo connection.
+     *
+     * @param ConnectionWrapper|\PDO|null $connection the connection object
+     * @throws \InvalidArgumentException if $connection is not of the suitable type.
+     */
+    public function __construct($connection = null)
     {
+        // Get a connection from Propel if we don't have one
+        if (null == $connection) {
+            $connection = Propel::getConnection(ServiceContainerInterface::CONNECTION_WRITE);
+        }
+
+        // Get the PDO connection from an
+        if ($connection instanceof ConnectionWrapper)
+            $connection = $connection->getWrappedConnection();
+
+        if (! $connection instanceof \PDO) {
+            throw new \InvalidArgumentException("A PDO connextion shoud be provided");
+        }
+
         $this->connection = $connection;
     }
 
@@ -69,11 +96,21 @@ class Database
         $size = count($sql);
         for ($i = 0; $i < $size; $i ++) {
             if (!empty($sql[$i])) {
-                $this->connection->query($sql[$i]);
+                $this->execute($sql[$i]);
             }
         }
     }
 
+    /**
+     * A simple wrapper around PDO::exec
+     *
+     * @param string $sql SQL query
+     * @param array $args SQL request parameters (PDO style)
+     */
+    public function execute($sql, $args = array()) {
+        $this->connection->exec($sql, $args);
+    }
+
     /**
      * Separate each sql instruction in an array
      *
@@ -104,7 +141,7 @@ class Database
      */
     public function createDatabase($dbName)
     {
-        $this->connection->exec(
+        $this->execute(
             sprintf(
                 "CREATE DATABASE IF NOT EXISTS %s CHARACTER SET utf8",
                 $dbName