HHH-14740 Still need the nullcheck removed in HHH-14727

Author: Sanne

hibernate-core/src/main/java/org/hibernate/exception/internal/StandardSQLExceptionConverter.java

@@ -20,13 +20,15 @@
  */
 public class StandardSQLExceptionConverter implements SQLExceptionConverter {
 
-	private final ArrayList<SQLExceptionConversionDelegate> delegates = new ArrayList<SQLExceptionConversionDelegate>(4);
+	private final ArrayList<SQLExceptionConversionDelegate> delegates = new ArrayList<>();
 
 	public StandardSQLExceptionConverter() {
 	}
 
 	public void addDelegate(SQLExceptionConversionDelegate delegate) {
-		this.delegates.add( delegate );
+		if ( delegate != null ) {
+			this.delegates.add( delegate );
+		}
 	}
 
 	@Override