> +
> +public abstract class BaseProfitBricksRequestBinder<T> implements MapBinder {
> +
> +   protected final StringBuilder requestBuilder;
> +   protected String paramName;
> +
> +   public BaseProfitBricksRequestBinder() {
> +      this.requestBuilder = new StringBuilder(255);
> +   }
> +
> +   @Override
> +   public <R extends HttpRequest> R bindToRequest(R request, Map<String, 
> Object> postParams) {
> +      checkNotNull(request, "request");
> +
> +      checkNotNull(paramName, "Initialize 'paramName' in constructor");
> +      Object obj = checkNotNull(postParams.get(paramName), format("Param 
> '%s' cannot be null.", paramName));

Minor: there's no need to manually format the message. The 
[checkNotNull(T,String,Object...)](http://docs.guava-libraries.googlecode.com/git-history/release/javadoc/com/google/common/base/Preconditions.html#checkNotNull(T,%20java.lang.String,%20java.lang.Object...))
 method already does that.

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