diff --git a/src/Adapters/Files/FilesAdapter.js b/src/Adapters/Files/FilesAdapter.js
index 1ddfbabb..d0dda004 100644
--- a/src/Adapters/Files/FilesAdapter.js
+++ b/src/Adapters/Files/FilesAdapter.js
@@ -12,6 +12,18 @@
 // database adapter.
 
 export class FilesAdapter {
+  /* this method is responsible to store the file in order to be retrived later by it's file name
+   * 
+   * 
+   * @param config the current config
+   * @param filename the filename to save
+   * @param data the buffer of data from the file
+   * @param contentType the supposed contentType
+   * @discussion the contentType can be undefined if the controller was not able to determine it 
+   * 
+   * @return a promise that should fail if the storage didn't succeed
+   * 
+   */
   createFile(config, filename: string, data, contentType: string) { }
 
   deleteFile(config, filename) { }