Sitecore Robots.txt generator

Robots.config

<configuration xmlns:patch="http://www.sitecore.net/xmlconfig/">
  <sitecore>
    <pipelines>
      <publishItem>
        <processor type="MikeRobbins.CMS.Robots.Robots,MikeRobbins.CMS" patch:after="processor[@type='Sitecore.Publishing.Pipelines.PublishItem.MoveItems, Sitecore.Kernel']" >
          <FileName>robots.txt</FileName>
          <ConfigTemplateName>Robots txt configuration</ConfigTemplateName>
          <WebApplicationRoot>C:\inetpub\wwwroot\MikeRobbins8u2\Website</WebApplicationRoot>
        </processor>
      </publishItem>
    </pipelines>
  </sitecore>
</configuration>

Robots.cs

public class Robots : PublishItemProcessor
    {
        public string FileName { get; set; }
        public string ConfigTemplateName { get; set; }
        public string WebApplicationRoot { get; set; }

        public override void Process(PublishItemContext context)
        {
            var target = context.PublishOptions.SourceDatabase.GetItem(context.ItemId, context.PublishOptions.Language);

            if (target.Name != "__Standard Values" && target.TemplateName == ConfigTemplateName)
            {
                var contents = GetTextFileData(target);
                WriteFile(contents);
            }

        }

        public string GetTextFileData(Item item)
        {
            var fileContents = "";

            fileContents = item["Header elements"];
            fileContents = fileContents + Environment.NewLine;
            fileContents = fileContents + item["Urls"];

            return fileContents;
        }

        public void WriteFile(string contents)
        {
            try
            {
                var tw = new StreamWriter(WebApplicationRoot + "\" + FileName);
                tw.Write(contents);
                tw.Close();
            }
            catch (IOException ex)
            {
                Sitecore.Diagnostics.Log.Error(ex.Message, ex, this);
            }
        }
    }