diff --git a/README.md b/README.md
new file mode 100644
index 0000000..d7fa84f
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+# Installation
+
+`composer require psys/utils`
+
diff --git a/src/File.php b/src/File.php
index 5f479f8..fb34c20 100644
--- a/src/File.php
+++ b/src/File.php
@@ -22,12 +22,17 @@ public function getDataURI($absPath)
         return 'data:' . $type . ';base64,' . base64_encode(file_get_contents($absPath));
     }
     
-    public function pathRemoveExtension ($path)
+    public function pathRemoveExtension (string $path) : string
     {
         $pozicePripony = strlen($path) - strrpos($path, '.');   //echo '<br>$pozicePripony: '.$pozicePripony;
         
         return substr($path, 0, -$pozicePripony);
     }
+
+    // public function pathGetExtension (string $path) : string
+    // {
+    //     return pathinfo($path, PATHINFO_EXTENSION);
+    // }
     
     public function createThumbnail ($soubor, $adresar)
     {
diff --git a/src/Result.php b/src/Result.php
index 9f8823d..9dce719 100644
--- a/src/Result.php
+++ b/src/Result.php
@@ -9,10 +9,7 @@ class Result
     private bool $status;
     private string $message;
 
-    function __construct
-    (
-        $status, $message = ''
-    )
+    function __construct (bool $status, string $message = '')
     {
         $this->status = $status;
         $this->message = $message;