Add customer design module

src/main/asciidoc/models/design/customer.puml

@@ -0,0 +1,64 @@
+@startuml
+
+skinparam linetype ortho
+skinparam groupInheritance 2
+
+package java.util {
+	class ArrayList
+	class Collection
+	class HashSet
+	class Optional
+	class Set
+}
+
+package catering {
+package customer {
+
+	class Customer {
+		- id: int
+		+ Customer()
+		+ addCustomer(customer: Customer): boolean
+		+ save(customer: Customer): void
+		+ count(): long
+		+ removeCustomer(customerID: int): boolean
+		+ getCustomers(): Collection<Customer>
+		+ findById(id: int): Optional<Customer>
+	}
+
+	class CustomerController {
+		+ CustomerController(staffRepository: StaffRepository)
+		+ getCustomer(model Model): String
+		+ removeCustomer(customerID: int, model Model): String
+		+ editCustomer(id: int, model Model): String
+		+ updateCustomer(customer: Customer): String
+	}
+
+	class CustomerDataInitializer {
+		+ CustomerDataInitializer(customeRepository: CustomeRepository)
+		+ initialize(): void
+	}
+
+	class CustomerRepository {
+		+ CustomerRepository()
+		+ addCustomer(customer: Customer): boolean
+		+ save(customer: Customer): void
+		+ count(): long
+		+ removeStaff(staffID: int) boolean
+		+ getCustomer(): Collection<Customer>
+		+ findById(id: int): Optional<Customer>
+	}
+
+}
+}
+
+CustomerRepository *-- Customer : -customer
+CustomerController --> CustomerRepository : -customerRepository
+CustomerDataInitializer --> CustomerRepository : -customerRepository
+CustomerRepository --> Set : -customers
+CustomerRepository --> HashSet : use
+CustomerRepository --> Collection : use
+CustomerRepository --> Optional : use
+CustomerRepository --> ArrayList : use
+
+
+@enduml