code: def set(bucket)
  			@queries['set'].execute(bucket.name, bucket.current, bucket.max, bucket.min, bucket.cost, bucket.refill_amount, bucket.refill_epoch, bucket.last_refill, bucket.total_used)
  		end
docs: saves a bucket into the storage
   * *Args*    :
     - +bucket+ -> the Bucket to set.  The <tt>name</tt> field in the Bucket option will be used as a key.
   * *Returns* :
     - an empty result set
   * *Raises* :
     - +Mysql::Error+ -> any issue with the connection to the database or the SQL statements