Can anybody make Code review for Java code written in FP?

Hello everyone, I'm a newbie here

I know it's Scala community, but I want in near future become scala programmer.

I received these assignments in high school, and they said that I should do them with OOP and Java, however, I did them with FP (: .

So, can anybody review this code? Because nobody in high school can't read it

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git repo: https://github.com/egoarka/itmo-oop

1 lab - skip this

2 lab - skip this

3 lab - may be reviewed (it's ini parser)

4 lab - may be reviewed (it's big assignment (in short: it's shop), should consist of dao layers and service layers)

daos interfaces:

ProductDao

ShopDao

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whole business layer is written with fp (so i think it's easier to read and support in future)

ShopService

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5 lab - may be reviewed (it's XML serializer from POJO to XML)

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In addition

- How would you rate mine code?

- I made for all these labs unit tests, what do you think about them too?

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thank you in advance