diff --git a/system/engine/registry.php b/system/engine/registry.php
index 091aeb3..41ec241 100644
--- a/system/engine/registry.php
+++ b/system/engine/registry.php
@@ -192,22 +192,22 @@ final class Registry {
 	 */
 	static public function addPreference($jsonFilePath) {
 		$dataArray = [];
-		if (file_exists($jsonFilePath)) {
-			$jsonData = file_get_contents($jsonFilePath);
-
+		if (file_exists($jsonFilePath) && $jsonData = file_get_contents($jsonFilePath)) {
+			
 			$dataArray = json_decode($jsonData, true);
 
 			// Verifica se a conversão foi bem-sucedida
 			if ($dataArray === null && json_last_error() !== JSON_ERROR_NONE) {
 				// Se houver um erro na conversão, trata o erro
-				$error = new \Phacil\Framework\Exception(json_last_error_msg());
+				$error = new \Phacil\Framework\Exception\Error(sprintf("DI preference %s error: ", $jsonFilePath). json_last_error_msg());
+				$error->setSeverity(E_PARSE);
 				return;
 			}
 		}
 		if (isset($dataArray['preferences']))
 			self::$preferences = array_merge(self::$preferences, $dataArray['preferences']);
 
-		if(count($dataArray) > 1) {
+		if(count($dataArray) >= 1) {
 			foreach($dataArray as $key => $value) {
 				if($key !== "preferences")
 					self::$diOptions[$key] = isset(self::$diOptions[$key]) ? self::array_merge_recursive_distinct(self::$diOptions[$key], $value) : $value;
@@ -365,7 +365,7 @@ final class Registry {
 	 * @throws \Exception 
 	 * @throws \Phacil\Framework\Exception 
 	 */
-	static public function checkType($class, $argument) {
+	protected static function checkType($class, $argument) {
 		if(isset(self::$diOptions['type'])){
 			if(isset(self::$diOptions['type'][$class])){
 				if(isset(self::$diOptions['type'][$class][$argument])){