@Override
	public void close() {
		closeConnection();
	}
This will be automatically invoked when BulkSignatures is out of scope, if using
try-with-resources to create it. When this happens we need to clean up the 
connection.
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/query/ingest/BulkSignatures.java