using phpmyadmin add this query.

this will add the component to the backend list too

INSERT INTO jos_components (name, link, admin_menu_link, admin_menu_alt, ‘option’, admin_menu_img, params) VALUES (‘Reviews’, ‘option=com_reviews’, ‘option=com_reviews’, ‘Manage Reviews’, ‘com_reviews’, ‘js/ThemeOffice/component.png’, ”);