Refine @SuppressWarnings("NullAway")

See gh-28797

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/SingleConnectionDataSource.java

@@ -179,7 +179,7 @@ public class SingleConnectionDataSource extends DriverManagerDataSource
 
 
 	@Override
-	@SuppressWarnings("NullAway") // Lazy initialization
+	@SuppressWarnings("NullAway") // Dataflow analysis limitation
 	public Connection getConnection() throws SQLException {
 		this.connectionLock.lock();
 		try {

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/embedded/EmbeddedDatabaseFactory.java

@@ -159,7 +159,7 @@ public class EmbeddedDatabaseFactory {
 	 * Factory method that returns the {@linkplain EmbeddedDatabase embedded database}
 	 * instance, which is also a {@link DataSource}.
 	 */
-	@SuppressWarnings("NullAway") // Lazy initialization
+	@SuppressWarnings("NullAway") // Dataflow analysis limitation
 	public EmbeddedDatabase getDatabase() {
 		if (this.dataSource == null) {
 			initDatabase();

spring-jdbc/src/main/java/org/springframework/jdbc/support/incrementer/AbstractColumnMaxValueIncrementer.java

@@ -43,7 +43,7 @@ public abstract class AbstractColumnMaxValueIncrementer extends AbstractDataFiel
 	 * @see #setIncrementerName
 	 * @see #setColumnName
 	 */
-	@SuppressWarnings("NullAway")
+	@SuppressWarnings("NullAway.Init")
 	public AbstractColumnMaxValueIncrementer() {
 	}