Properly name classes

* All should be PSR-4

Signed-off-by: Roeland Jago Douma <roeland@famdouma.nl>

lib/Db/DbBase.php

@@ -9,13 +9,13 @@
  * later.
  */
 
-namespace OCA\Richdocuments;
+namespace OCA\Richdocuments\Db;
 
 /**
  * Generic DB class
  */
 
-abstract class Db {
+abstract class DbBase {
 
 	protected $data;
 

lib/Db/Wopi.php

@@ -11,10 +11,7 @@
 
 namespace OCA\Richdocuments\Db;
 
-use \OCA\Richdocuments\Download;
-use \OCA\Richdocuments\DownloadResponse;
-
-class Wopi extends \OCA\Richdocuments\Db{
+class Wopi extends DbBase {
 
 	const DB_TABLE = '`*PREFIX*richdocuments_wopi`';