Design and implement a program that creates an exception class called InvalidDocumentCodeException, designed to be thrown when an improper designation for a document is encountered during processing. Suppose that in a particular business, all documents are given a two-character designation starting with U, C, or P, which stand for unclassified, confidential, or proprietary. If a document designation is encountered that doesn’t fit that description, the exception is thrown. Create a driver program to test the exception, allowing it to terminate the program.
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