code: public static Connection close(Connection conn, Logger logExceptionTo)
  	{
  		return close(conn,logExceptionTo,null);
  	}
docs: Handle closing a connection. Calls
  {@link #close(Connection,Logger,Object)} with null for name.
  @param conn The conneciton to close.
  @param logExceptionTo The log to log any {@link SQLException}
  to. If this is null, the logger for the DbCloser class
  will be used.
  @return null as a convinence to null out the closed object.