base storage symbolic workflow

IOE - IOException
CDE - CorruptDataException
IAE - IllegalArgumentException
INRE - IllegalNumberRangeException



write(o)
	initialize (load from provider using parser)

	readonly
		-> IOE

	next free slot >= capacity
		-> IOE

	corrupt
		-> CDE (null, "message.");

	o is null
		->
		IAE

	writeToFreeSlot



read(i)
	initialize

	index < 0 OR
	index >= capacity
		-> INRE

	i >= next free slot
		-> IOE

	corrupt
		-> CDE (null data, message)

	null at index i
		-> IOE

	return item at index i