AmazonS3: ensure that errorStream is closed

Change-Id: I2abde5dbd4b785d70b7bc0b77188c0a075130eeb
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java

@@ -529,21 +529,29 @@ public class AmazonS3 {
 				Integer.valueOf(HttpSupport.response(c)),
 				c.getResponseMessage()));
 		final InputStream errorStream = c.getErrorStream();
-		if (errorStream == null)
+		if (errorStream == null) {
 			return err;
+		}
 
+		try {
 			final ByteArrayOutputStream b = new ByteArrayOutputStream();
 			byte[] buf = new byte[2048];
 			for (;;) {
 				final int n = errorStream.read(buf);
-			if (n < 0)
+				if (n < 0) {
 					break;
-			if (n > 0)
+				}
+				if (n > 0) {
 					b.write(buf, 0, n);
 				}
+			}
 			buf = b.toByteArray();
-		if (buf.length > 0)
+			if (buf.length > 0) {
 				err.initCause(new IOException("\n" + new String(buf))); //$NON-NLS-1$
+			}
+		} finally {
+			errorStream.close();
+		}
 		return err;
 	}