diff --git a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/AbstractMediaFileManager.java b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/AbstractMediaFileManager.java
index d9265fe..c9877c5 100644
--- a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/AbstractMediaFileManager.java
+++ b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/AbstractMediaFileManager.java
@@ -54,6 +54,7 @@ public abstract class AbstractMediaFileManager {
 	public abstract String getExtension();
 	public boolean isEmpty() { return isEmpty; }
 	public boolean isDownloaded() { return new File(getTargetPathAndFilename()).isFile(); }
+	public boolean isDownloading() { return new File(getTargetPathAndFilename() + ".downloading").isFile(); }
 	public abstract void download() throws RpcErrorException, IOException;
 	public static void throwUnexpectedObjectError(Object o) {
 		throw new RuntimeException("Unexpected " + o.getClass().getName());
diff --git a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/StickerFileManager.java b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/StickerFileManager.java
index 10e16ba..48d7219 100644
--- a/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/StickerFileManager.java
+++ b/src/main/java/de/fabianonline/telegram_backup/mediafilemanager/StickerFileManager.java
@@ -47,19 +47,10 @@ public class StickerFileManager extends DocumentFileManager {
 	public StickerFileManager(TLMessage msg, UserManager user, TelegramClient client) {
 		super(msg, user, client);
 	}
-	/*	TLAbsDocument d = ((TLMessageMediaDocument)msg.getMedia()).getDocument();
-		if (d instanceof TLDocument) {
-			this.doc = (TLDocument)d;
-		} else if (d instanceof TLDocumentEmpty) {
-			this.isEmpty = true;
-		} else {
-			throwUnexpectedObjectError(d);
-		}
-	}*/
 	
 	public boolean isSticker() { return true; }
 	
-	public String getTargetFilename() {
+	private String getFilenameBase() {
 		TLDocumentAttributeSticker sticker = null;
 		for(TLAbsDocumentAttribute attr : doc.getAttributes()) {
 			if (attr instanceof TLDocumentAttributeSticker) {
@@ -75,11 +66,13 @@ public class StickerFileManager extends DocumentFileManager {
 		}
 		file.append("_");
 		file.append(sticker.getAlt().hashCode());
-		file.append(".");
-		file.append(getExtension());
 		return file.toString();
 	}
 	
+	public String getTargetFilename() {
+		return getFilenameBase() + "." + getExtension();
+	}
+	
 	public String getTargetPath() {
 		String path = Config.FILE_BASE + File.separatorChar + Config.FILE_STICKER_BASE + File.separatorChar;
 		new File(path).mkdirs();