Travis added
class diagram image added
OperationHandler interface added
OperationHandlerTest implemented
Class Diagram updated
Operation, Summation, Subtraction interfaces added
SummationTest, SubtractionTest implemented
OperationHandler class implemented
Operation, Subtraction, Summation classes implemented
Tests passed successfully
Main add & implemented
The application is running properly
Multiplication interface added
MultiplicationTest implemented
Multiplication class implemented
MultiplicationTest is running successfully
Summation.class changed to Addition.class
All the Tests have been passed successfully
The application is running properly
Main modified adding Multiplication operations
The application is still running properly