+ *
+ * @covers FileBackend
+ *
+ * @covers CopyFileOp
+ * @covers CreateFileOp
+ * @covers DeleteFileOp
+ * @covers DescribeFileOp
+ * @covers FSFile
+ * @covers FSFileBackend
+ * @covers FSFileBackendDirList
+ * @covers FSFileBackendFileList
+ * @covers FSFileBackendList
+ * @covers FSFileOpHandle
+ * @covers FileBackendDBRepoWrapper
+ * @covers FileBackendError
+ * @covers FileBackendGroup
+ * @covers FileBackendMultiWrite
+ * @covers FileBackendStore
+ * @covers FileBackendStoreOpHandle
+ * @covers FileBackendStoreShardDirIterator
+ * @covers FileBackendStoreShardFileIterator
+ * @covers FileBackendStoreShardListIterator
+ * @covers FileJournal
+ * @covers FileOp
+ * @covers FileOpBatch
+ * @covers HTTPFileStreamer
+ * @covers LockManagerGroup
+ * @covers MemoryFileBackend
+ * @covers MoveFileOp
+ * @covers MySqlLockManager
+ * @covers NullFileJournal
+ * @covers NullFileOp
+ * @covers StoreFileOp
+ * @covers TempFSFile
+ *
+ * @covers FSLockManager
+ * @covers LockManager
+ * @covers NullLockManager