There is a trick to hide the details within a module by barrel files, via which you can

• just introduce the barrel file (normally named as index.ts) to that module, and
• export everything you intend to export in that barrel file, and then
• import the module path whenever you try to use the exported class/interface or components;

As a follow-up, there is an another answer to elaborate what you can achieve by using barrel files.

index file will be helpful to you if you don't want to show the entire path of your class

Assume that you have a module MyModule within which you have IGeneric class

igeneric.model.ts

export class IGeneric{
header : any[];
content : [{
   lable :any,
   value :any
}]

Index file should be inside your Module MyModule directory

index.ts

export * from 'app/MyModule/igeneric.model';

Then in your component you can import

import {IGeneric} from 'app/MyModule'

This looks like an ES6/Typescript module import/export issue rather than an issue for (the completely different and separate) NgModule system. If this is the case, then you simply need to import the class you want from the file you want at the top of the .ts file, e.g.:

import { IGeneric } from './relative/path/to/definition';

and then use the class as you would normally in a component/service etc

public generic: IGeneric;