Model: (I am making databases here using hashmaps)

Extract_Excel_file_1.java
Exctract_Excel_file_2.java
Extract_Excel_file3.java

Controller: (perform operations here on the model data importing databases)

Manipulate_data_excelfile_1.java
Manipulate_data_excelfile_2.java
Manipulate_data_excelfile_3.java
print_new_excel.java

View: (not yet implemented, but get data from controller)

Display_interface.java
load_excel_files_location.java
button_press_call_print_excel.java

customer:
Load excel files path and press button to generate new excel