Added OFBufferId class to represent OF buffer ids
diff --git a/test_data/of13/packet_in.data b/test_data/of13/packet_in.data
index 1ec0422..b32bbee 100644
--- a/test_data/of13/packet_in.data
+++ b/test_data/of13/packet_in.data
@@ -33,7 +33,7 @@
 -- java
 builder
    .setXid(0x12345678)
-   .setBufferId(100)
+   .setBufferId(OFBufferId.of(100))
    .setTotalLen(17000)
    .setReason(OFPacketInReason.ACTION)
    .setTableId((byte) 20)