if you need to create a new component in your angular 2, follow this template to create a new component and a new file. be sure to name the component and the file name in the naming convention: dash case (AKA kebab-case)

hero-detail-component.ts 

import { Component} from '@angular/core';

@Component({
	//We create metadata with the @Component decorator where we 
	//specify the selector name that identifies this component's element
  selector: 'my-hero-detail',
})

//we export the class to make it available to other components.
export class HeroDetailComponent {
}
source: https://angular.io/docs/ts/latest/tutorial/toh-pt3.html