Changelog exception added

Author: bram-pkg

src/Changelog.php

@@ -2,22 +2,22 @@
 
 namespace BlameButton\Laravel\Changelog;
 
+use BlameButton\Laravel\Changelog\Exceptions\ChangelogNotFoundException;
 use Illuminate\Support\Facades\Storage;
 
 class Changelog
 {
-    // Build your next great package.
-
     private function getFile(): string
     {
         return config('config.file', base_path('CHANGELOG.md'));
     }
 
-    public function raw(): ?string
+    public function raw(): string
     {
         $file = $this->getFile();
+
         if (!Storage::exists($file)) {
-            return null;
+            throw new ChangelogNotFoundException();
         }
 
         return Storage::get($file);

src/Exceptions/ChangelogNotFoundException.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace BlameButton\Laravel\Changelog\Exceptions;
+
+use RuntimeException;
+
+class ChangelogNotFoundException extends RuntimeException
+{
+
+}