dont overwrite existing events

Author: taylorotwell

src/Illuminate/Foundation/Console/EventMakeCommand.php

@@ -35,7 +35,8 @@ class EventMakeCommand extends GeneratorCommand
      */
     protected function alreadyExists($rawName)
     {
-        return class_exists($rawName);
+        return class_exists($rawName) ||
+               $this->files->exists($this->getPath($this->qualifyClass($rawName)));
     }
 
     /**