How to CATCH when database not exists?

What is the best solution/workaround for the following CATCH failure?  Thanks.

BEGIN TRY
IF EXISTS(SELECT * FROM NorthwindX.INFORMATION_SCHEMA.TABLES)
		PRINT 'DB OK';
END TRY
BEGIN CATCH
		PRINT 'DB OFFLINE';
END CATCH

/*
Msg 208, Level 16, State 1, Line 2
Invalid object name 'NorthwindX.INFORMATION_SCHEMA.TABLES'.
*/

Kalman Toth Database & OLAP Architect SQL Server 2014 Database Design
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