Formatted code using this formatter: https://github.com/google/styleguide/blob/gh-pages/eclipse-java-google-style.xml Removed argument final declaration on interface Updated addCustomer logic for cases where the added customer already exists
Formatted code using this formatter: https://github.com/google/styleguide/blob/gh-pages/eclipse-java-google-style.xml Removed argument final declaration on interface Updated addCustomer logic for cases where the added customer already exists