Fix checkstyle errors

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/flyway/FlywayMigrationInitializer.java

@@ -37,7 +37,7 @@ public class FlywayMigrationInitializer implements InitializingBean, Ordered {
 	private int order = 0;
 
 	/**
-	 * Create a new {@link FlywayMigrationInitializer}
+	 * Create a new {@link FlywayMigrationInitializer} instance.
 	 * @param flyway the flyway instance
 	 */
 	public FlywayMigrationInitializer(Flyway flyway) {
@@ -45,7 +45,7 @@ public class FlywayMigrationInitializer implements InitializingBean, Ordered {
 	}
 
 	/**
-	 * Create a new {@link FlywayMigrationInitializer}
+	 * Create a new {@link FlywayMigrationInitializer} instance.
 	 * @param flyway the flyway instance
 	 * @param migrationStrategy the migration stragety or {@code null}
 	 */

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/jdbc/DataSourceProperties.java

@@ -347,7 +347,7 @@ public class DataSourceProperties implements BeanClassLoaderAware, EnvironmentAw
 
 	private static class DataSourceBeanCreationException extends BeanCreationException {
 
-		public DataSourceBeanCreationException(EmbeddedDatabaseConnection connection,
+		DataSourceBeanCreationException(EmbeddedDatabaseConnection connection,
 				Environment environment, String property) {
 			super(getMessage(connection, environment, property));
 		}

spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/AbstractErrorController.java

@@ -31,8 +31,8 @@ import org.springframework.web.context.request.ServletRequestAttributes;
  *
  * @author Dave Syer
  * @author Phillip Webb
- * @see ErrorAttributes
  * @since 1.3.0
+ * @see ErrorAttributes
  */
 public abstract class AbstractErrorController implements ErrorController {