Error interceptor catches if an exception is thrown.

ErrorHandlingInterceptor.kt

class ErrorHandlingInterceptor(
    private val networkHandler: NetworkHandler
) : Interceptor {

    override fun intercept(chain: Interceptor.Chain): Response {
        if (!networkHandler.isConnected) {
            throw NoConnectivityError
        }

        return try {
            chain.proceed(chain.request())
        } catch (e: Exception) {
            throw when (e) {
                is UnknownHostException -> UnknownHostError
                is HttpException -> HttpError(e.code(), e.message())
                is SocketTimeoutException -> TimeOutError(e.message)
                else -> IOException(e)
            }
        }
    }
}