A simple Log for ULS

using System;
using Microsoft.SharePoint.Administration;

namespace Contoso.Intranet.Portal.Utilities
{
    public class Log
    {
        private static readonly string \_CATEGORYNAME = "CONTOSO";
        private static readonly SPDiagnosticsCategory \_ERROR\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Unexpected, EventSeverity.Error);
        private static readonly SPDiagnosticsCategory \_WARNING\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.High, EventSeverity.Warning);
        private static readonly SPDiagnosticsCategory \_VERBOSE\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Verbose, EventSeverity.Verbose);
        private static readonly SPDiagnosticsCategory \_INFO\_CATEGORY = 
              new SPDiagnosticsCategory(\_CATEGORYNAME, TraceSeverity.Medium, EventSeverity.Information);

        private static void WriteTrace(SPDiagnosticsCategory category, string message, string trace)
        {
            SPDiagnosticsService.Local.WriteTrace(0, category, category.DefaultTraceSeverity, message, trace);
        }

        public static void Error(Exception ex)
        {
            WriteTrace(\_ERROR\_CATEGORY, ex.Message, ex.StackTrace);
        }

        public static void Warning(string message)
        {
            WriteTrace(\_WARNING\_CATEGORY, message, "");
        }

        public static void Verbose(string message)
        {
            WriteTrace(\_VERBOSE\_CATEGORY, message, "");
        }

        public static void Info(string message)
        {
            WriteTrace(\_INFO\_CATEGORY, message, "");
        }

    }
}