Polish "Honor a wrapper's unwrap when resolving the root DataSource"

See gh-51410

module/spring-boot-jdbc/src/main/java/org/springframework/boot/jdbc/DataSourceUnwrapper.java

@@ -94,9 +94,10 @@ public final class DataSourceUnwrapper {
 	}
 
 	/**
-	 * Return the root {@link DataSource} by recursively unwrapping all
-	 * {@link org.springframework.jdbc.datasource.DelegatingDataSource delegating}, proxy,
-	 * and {@link java.sql.Wrapper} layers until no further unwrapping is possible.
+	 * Return the root {@link DataSource} by recursively unwrapping
+	 * {@link java.sql.Wrapper},
+	 * {@link org.springframework.jdbc.datasource.DelegatingDataSource delegating}, and
+	 * proxy layers until no further unwrapping is possible.
 	 * @param dataSource the datasource to unwrap
 	 * @return the root {@link DataSource}
 	 * @since 4.1.0

module/spring-boot-jdbc/src/test/java/org/springframework/boot/jdbc/DataSourceUnwrapperTests.java

@@ -181,12 +181,12 @@ class DataSourceUnwrapperTests {
 	private static final class SelfReturningDataSource extends AbstractDataSource {
 
 		@Override
-		public Connection getConnection() throws SQLException {
+		public Connection getConnection() {
 			throw new UnsupportedOperationException();
 		}
 
 		@Override
-		public Connection getConnection(String username, String password) throws SQLException {
+		public Connection getConnection(String username, String password) {
 			throw new UnsupportedOperationException();
 		}