--- a/src/goodjava/lucene/backup/BackupServer.java	Sun May 10 13:06:11 2020 -0600
+++ b/src/goodjava/lucene/backup/BackupServer.java	Sun May 10 22:28:13 2020 -0600
@@ -10,6 +10,7 @@
 import javax.net.ssl.SSLServerSocketFactory;
 import javax.net.ssl.SSLServerSocket;
 import goodjava.util.SoftCacheMap;
+import goodjava.io.IoUtils;
 import goodjava.rpc.RpcServer;
 import goodjava.rpc.RpcCall;
 import goodjava.logging.Logger;
@@ -41,9 +42,9 @@
 	private static final ThreadPoolExecutor threadPool = (ThreadPoolExecutor)Executors.newCachedThreadPool();
 	private static final Map<String,Backup> backups = new SoftCacheMap<String,Backup>();
 
-	public BackupServer(File backupDir) {
+	public BackupServer(File backupDir) throws IOException {
 		this.backupDir = backupDir;
-		backupDir.mkdirs();
+		IoUtils.mkdirs(backupDir);
 	}
 
 	public synchronized void start() throws IOException {