I have created a branch to refactor DAO pattern https://github.com/iluwatar/java-design-patterns/tree/refactor-dao

Done

• Refined interface according to Java 8
• Feedback from CUD operations
• Renamed existing implementation to InMemoryCustomerDao

To be Done

• Add DBDao (But I was wondering who should create the schema)

Does App needs to have knowledge about the datasource that will be utilized so that it can create schema? Does anyone have hands on experience on this?