As of Java 1.7 implementations of JDBC interfaces Connection, Statement, PreparedStatement, CallableStatement and ResulSet must implement the AutoCloseable interface with method close(). This method is invoked automatically on objects managed by the try-with-resources statement. See http://docs.oracle.com/javase/7/docs/technotes/guides/language/try-with-resources.html http://docs.oracle.com/javase/7/docs/api/java/lang/AutoCloseable.html http://docs.oracle.com/javase/7/docs/api/java/sql/Connection.html http://docs.oracle.com/javase/7/docs/api/java/sql/Statement.html http://docs.oracle.com/javase/7/docs/api/java/sql/PreparedStatement.html http://docs.oracle.com/javase/7/docs/api/java/sql/CallableStatement.html http://docs.oracle.com/javase/7/docs/api/java/sql/ResultSet.html

--- a/src/main/java/nl/cwi/monetdb/jdbc/MonetResultSet.java
+++ b/src/main/java/nl/cwi/monetdb/jdbc/MonetResultSet.java
@@ -66,7 +66,10 @@ import java.util.TimeZone;
  * @author Fabian Groffen, Martin van Dinther
  * @version 0.8
  */
-public class MonetResultSet extends MonetWrapper implements ResultSet {
+public class MonetResultSet
+	extends MonetWrapper
+	implements ResultSet, AutoCloseable
+{
 	// the following have default access modifier for the MonetVirtualResultSet subclass
 	/** The current line of the buffer split in columns */
 	final TupleLineParser tlp;