Rename buf -> buffer, fixed documentation.

src/org/apollo/update/JagGrabRequestWorker.java

@@ -39,10 +39,10 @@ public final class JagGrabRequestWorker extends RequestWorker<JagGrabRequest, Re
 
 	@Override
 	protected void service(ResourceProvider provider, Channel channel, JagGrabRequest request) throws IOException {
-		Optional<ByteBuffer> buf = provider.get(request.getFilePath());
+		Optional<ByteBuffer> buffer = provider.get(request.getFilePath());
 
-		if (buf.isPresent()) {
-			ByteBuf wrapped = Unpooled.wrappedBuffer(buf.get());
+		if (buffer.isPresent()) {
+			ByteBuf wrapped = Unpooled.wrappedBuffer(buffer.get());
 			channel.writeAndFlush(new JagGrabResponse(wrapped)).addListener(ChannelFutureListener.CLOSE);
 		} else {
 			channel.close();

src/org/apollo/update/resource/ResourceProvider.java

@@ -21,7 +21,7 @@ public interface ResourceProvider {
 	public boolean accept(String path) throws IOException;
 
 	/**
-	 * Returns a resource as a {@link ByteBuffer} if it exists.
+	 * The resource data, as a {@link ByteBuffer}, wrapped in an {@link Optional}.
 	 * 
 	 * @param path The path to the resource.
 	 * @return A {@code ByteBuffer} representation of a resource if it exists otherwise {@link Optional#empty()} is