make checkstyle happy #1121

Job	Run time
Run checkstyle	40s
Run integration test with Java 11 and Maven 3.6.3	1m 20s
Run integration test with Java 11 and Maven 4.0.0-beta-5	1m 3s
Run integration test with Java 11 and Maven 3.8.8	1m 9s
Run integration test with Java 11 and Maven 3.9.9	1m 1s
Run integration test with Java 11 and Maven 4.0.0-alpha-13	1m 4s
Run integration test with Java 11 and Maven 4.0.0-rc-2	1m 6s
Run basic test with Java 14	47s
Run basic test with Java 20	46s
Run basic test with Java 17	52s
Run basic test with Java 22	46s
Run basic test with Java 13	47s
Run basic test with Java 15	52s
Run basic test with Java 11	47s
Run basic test with Java 21	46s
Run basic test with Java 12	45s
Run basic test with Java 16	45s
Run basic test with Java 19	46s
Run basic test with Java 18	47s
Run basic test with Java 25	47s
Run basic test with Java 23	45s
Run basic test with Java 24	50s
Run basic test with Java 26	50s
Run coveralls	-1s
Deploy snapshot	-1s
	19m 59s

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