Raise error instead when the correct metadata can't be found on the author's page

fanficdownloader/adapters/adapter_bloodshedversecom.py

@@ -97,6 +97,8 @@ class BloodshedverseComAdapter(BaseSiteAdapter):
             # parse the element
             if query_data['no'] == story_no:
                 break
+        else:
+            raise exceptions.FailedToDownload(self.url)
 
         title_anchor = list_box.find('a', {'class': 'fictitle'})
         self.story.setMetadata('title', title_anchor.string.strip())

fanficdownloader/adapters/adapter_nocturnallightnet.py

@@ -97,6 +97,8 @@ class NocturnalLightNetAdapter(BaseSiteAdapter):
             # parse the element
             if story_id == url_tokens[url_tokens.index('story')+1]:
                 break
+        else:
+            raise exceptions.FailedToDownload(self.url)
 
         title = listbox.a.string
         self.story.setMetadata('title', title)