diff --git a/lib/SimpleSAML/Store.php b/lib/SimpleSAML/Store.php
index 0a95acf9545f0e9ca30a8356ad4286c7e8e9ea2d..0b3b8bd3be7406a852b75dee2acc1b813d5caf15 100644
--- a/lib/SimpleSAML/Store.php
+++ b/lib/SimpleSAML/Store.php
@@ -1,87 +1,91 @@
 <?php
 
+
 /**
  * Base class for data stores.
  *
  * @package SimpleSAMLphp
  */
-abstract class SimpleSAML_Store {
-
-	/**
-	 * Our singleton instance.
-	 *
-	 * This is false if the data store isn't enabled, and null if we haven't attempted to initialize it.
-	 *
-	 * @var SimpleSAML_Store|boolean|null
-	 */
-	private static $instance;
-
-
-	/**
-	 * Retrieve our singleton instance.
-	 *
-	 * @return SimpleSAML_Store|boolean  The data store, or false if it isn't enabled.
-	 */
-	public static function getInstance() {
-
-		if (self::$instance !== NULL) {
-			return self::$instance;
-		}
-
-		$config = SimpleSAML_Configuration::getInstance();
-		$storeType = $config->getString('store.type', NULL);
-		if ($storeType === NULL) {
-			$storeType = $config->getString('session.handler', 'phpsession');
-		}
-
-		switch ($storeType) {
-		case 'phpsession':
-			/* We cannot support advanced features with the PHP session store. */
-			self::$instance = FALSE;
-			break;
-		case 'memcache':
-			self::$instance = new SimpleSAML_Store_Memcache();
-			break;
-		case 'sql':
-			self::$instance = new SimpleSAML_Store_SQL();
-			break;
-		default:
-			/* Datastore from module. */
-			$className = SimpleSAML_Module::resolveClass($storeType, 'Store', 'SimpleSAML_Store');
-			self::$instance = new $className();
-		}
-
-		return self::$instance;
-	}
-
-
-	/**
-	 * Retrieve a value from the data store.
-	 *
-	 * @param string $type The data type.
-	 * @param string $key The key.
-	 * @return mixed|null The value.
-	 */
-	abstract public function get($type, $key);
-
-
-	/**
-	 * Save a value to the data store.
-	 *
-	 * @param string $type The data type.
-	 * @param string $key The key.
-	 * @param mixed $value The value.
-	 * @param int|null $expire The expiration time (unix timestamp), or null if it never expires.
-	 */
-	abstract public function set($type, $key, $value, $expire = NULL);
-
-
-	/**
-	 * Delete a value from the data store.
-	 *
-	 * @param string $type The data type.
-	 * @param string $key The key.
-	 */
-	abstract public function delete($type, $key);
+abstract class SimpleSAML_Store
+{
+
+    /**
+     * Our singleton instance.
+     *
+     * This is false if the data store isn't enabled, and null if we haven't attempted to initialize it.
+     *
+     * @var SimpleSAML_Store|boolean|null
+     */
+    private static $instance;
+
+
+    /**
+     * Retrieve our singleton instance.
+     *
+     * @return SimpleSAML_Store|boolean  The data store, or false if it isn't enabled.
+     */
+    public static function getInstance()
+    {
+
+        if (self::$instance !== null) {
+            return self::$instance;
+        }
+
+        $config = SimpleSAML_Configuration::getInstance();
+        $storeType = $config->getString('store.type', null);
+        if ($storeType === null) {
+            $storeType = $config->getString('session.handler', 'phpsession');
+        }
+
+        switch ($storeType) {
+            case 'phpsession':
+                // we cannot support advanced features with the PHP session store
+                self::$instance = false;
+                break;
+            case 'memcache':
+                self::$instance = new SimpleSAML_Store_Memcache();
+                break;
+            case 'sql':
+                self::$instance = new SimpleSAML_Store_SQL();
+                break;
+            default:
+                // datastore from module
+                $className = SimpleSAML_Module::resolveClass($storeType, 'Store', 'SimpleSAML_Store');
+                self::$instance = new $className();
+        }
+
+        return self::$instance;
+    }
+
+
+    /**
+     * Retrieve a value from the data store.
+     *
+     * @param string $type The data type.
+     * @param string $key The key.
+     *
+     * @return mixed|null The value.
+     */
+    abstract public function get($type, $key);
+
+
+    /**
+     * Save a value to the data store.
+     *
+     * @param string   $type The data type.
+     * @param string   $key The key.
+     * @param mixed    $value The value.
+     * @param int|null $expire The expiration time (unix timestamp), or null if it never expires.
+     */
+    abstract public function set($type, $key, $value, $expire = null);
+
+
+    /**
+     * Delete a value from the data store.
+     *
+     * @param string $type The data type.
+     * @param string $key The key.
+     */
+    abstract public function delete($type, $key);
 
 }