Lazy initialize external storages

Fixed the following external storages to not connect in the constructor,
but do it on-demand when getConnection() is called.
- S3
- SWIFT
- SFTP

1 files changed, 1 insertions, 1 deletions

diff --git a/apps/files_external/lib/ftp.php b/apps/files_external/lib/ftp.php
index 2650a94f85e..4a995d21157 100644
--- a/apps/files_external/lib/ftp.php
+++ b/apps/files_external/lib/ftp.php
@@ -39,7 +39,7 @@ class FTP extends \OC\Files\Storage\StreamWrapper{
 				$this->root .= '/';
 			}
 		} else {
-			throw new \Exception();
+			throw new \Exception('Creating \OC\Files\Storage\FTP storage failed');
 		}
 		
 	}