docs: improve health check

health-check/src/main/java/com/iluwatar/health/check/HealthCheckRepository.java

@@ -66,7 +66,7 @@ public class HealthCheckRepository {
    * @throws Exception if the test transaction fails
    */
   @Transactional
-  public void performTestTransaction() {
+  public void performTestTransaction() throws Exception {
     try {
       HealthCheck healthCheck = new HealthCheck();
       healthCheck.setStatus(HEALTH_CHECK_OK);

health-check/src/test/java/CustomHealthIndicatorTest.java

@@ -22,9 +22,14 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.mockito.ArgumentMatchers.anyLong;
-import static org.mockito.Mockito.*;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
 
 import com.iluwatar.health.check.AsynchronousHealthChecker;
 import com.iluwatar.health.check.CustomHealthIndicator;

health-check/src/test/java/DatabaseTransactionHealthIndicatorTest.java

@@ -22,9 +22,13 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.*;
+import static org.mockito.Mockito.doNothing;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.when;
 
 import com.iluwatar.health.check.AsynchronousHealthChecker;
 import com.iluwatar.health.check.DatabaseTransactionHealthIndicator;