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= Analysis =

== Overview ==
This task should provide a class structure for persisting books with all their elements.

== Task requirements ==
 * Revise the current code for persisting that is in org.sophie2.main.model module.
 * Create a class diagram(s) for the class structure related to persistence.
 * Modularize to the base.persistence module.
 * Review the existing unit tests and fix them if needed.

== Task result ==
The result of this task should be:
 * source code
 * class diagram(s)
 * working unit tests 

== Implementation idea ==
 * Review the existing source code.
 * Create the class diagram(s).
 * Refactor and clean up according to the diagram.
 * Run unit tests and fix problems if any. 

== Related ==

== How to demo ==
 * Show the class diagrams and explain them.
 * Show the source code related to persistence.
 * Run unit tests to demonstrate the model. 

= Design =

= Implementation =
^(Implementation results should be described and linked here (from the wiki or the repository))^

= Testing =

= Comments =
^(Write comments for this or later revisions here.)