POC project on Dagger2

Employee is dependent on Salary and ContactDetails.
Residence is dependent on Address.

Annotations :

1. @Inject : tells the Dagger how to create instances of Employee
2. @Module : tells Dagger how to provide dependencies from the dependency graph.
3. @Provides :
4. @Binds :
5. @Component : tells Dagger to generate a container with all the dependencies required to satisfy the types it exposes.

Dependency Injection types :

1. Constructor Injection: Injecting the method parameters.
2. Field Injection: Injecting the member variable (must not be private).
3. Method Injection: Injecting the method parameter.

Order of dependency injection according to JSR330 (Java Specification Requests) :

1. Constructor
2. Field
3. Method