RefDirectory: Open BufferedReader in try-with-resource

Change-Id: I9239df3e381b141b48ad7ea1b706e5b5927946cd
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/RefDirectory.java

@@ -940,19 +940,11 @@ public class RefDirectory extends RefDatabase {
 		int retries = 0;
 		while (true) {
 			final FileSnapshot snapshot = FileSnapshot.save(packedRefsFile);
-			final BufferedReader br;
 			final MessageDigest digest = Constants.newMessageDigest();
-			try {
-				br = new BufferedReader(new InputStreamReader(
+			try (BufferedReader br = new BufferedReader(new InputStreamReader(
 					new DigestInputStream(new FileInputStream(packedRefsFile),
-								digest), CHARSET));
-			} catch (FileNotFoundException noPackedRefs) {
-				if (packedRefsFile.exists()) {
-					throw noPackedRefs;
-				}
-				// Ignore it and leave the new list empty.
-				return NO_PACKED_REFS;
-			}
+							digest),
+					CHARSET))) {
 				try {
 					return new PackedRefList(parsePackedRefs(br), snapshot,
 							ObjectId.fromRaw(digest.digest()));
@@ -968,8 +960,13 @@ public class RefDirectory extends RefDatabase {
 						continue;
 					}
 					throw e;
-			} finally {
-				br.close();
+				}
+			} catch (FileNotFoundException noPackedRefs) {
+				if (packedRefsFile.exists()) {
+					throw noPackedRefs;
+				}
+				// Ignore it and leave the new list empty.
+				return NO_PACKED_REFS;
 			}
 		}
 	}