From 3e64b336a8edcec559d8d3ed20e4d6541fadadfa Mon Sep 17 00:00:00 2001
From: Fabian Schlenz <mail@fabianonline.de>
Date: Wed, 27 Jul 2016 06:11:50 +0200
Subject: [PATCH] Only create a database backup if there isn't one already.
 This prevents overwriting a perfectly fine backup with a more or less broken
 one in case a database update fails.

---
 src/main/java/de/fabianonline/telegram_backup/Database.java | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/main/java/de/fabianonline/telegram_backup/Database.java b/src/main/java/de/fabianonline/telegram_backup/Database.java
index 58fa2bd..cd80448 100644
--- a/src/main/java/de/fabianonline/telegram_backup/Database.java
+++ b/src/main/java/de/fabianonline/telegram_backup/Database.java
@@ -41,6 +41,7 @@ import java.util.HashMap;
 import java.util.Date;
 import java.nio.file.Files;
 import java.nio.file.StandardCopyOption;
+import java.nio.file.FileAlreadyExistsException;
 import java.text.SimpleDateFormat;
 
 import de.fabianonline.telegram_backup.mediafilemanager.AbstractMediaFileManager;
@@ -97,8 +98,9 @@ public class Database {
 			logger.debug("Copying {} to {}", src, dst);
 			Files.copy(
 				new File(src).toPath(),
-				new File(dst).toPath(),
-				StandardCopyOption.REPLACE_EXISTING);
+				new File(dst).toPath());
+		} catch (FileAlreadyExistsException e) {
+			logger.warn("Backup already exists:", e);
 		} catch (IOException e) {
 			e.printStackTrace();
 			throw new RuntimeException("Could not create backup.");