try {
            con = DriverManager.getConnection(getBase, getBase_login, getBase_password);
            proc = con.prepareCall("{ call xxxx())}");
            rs = proc.executeQuery();
            rs.next;
          ..........
        } catch (SQLException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        } finally {
            try {
                proc.close();
                rs.close();
                con.close();
            } catch (SQLException ex) {
                Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
            }
        }

Нотация может использоваться для любого класса, реализующего новый интерфейс java.lang.AutoCloseable. 
Сейчас он реализуется множеством классов (InputStream, OutputStream, JarFile, Reader, 
Writer, Socket, ZipFile) и интерфейсов (java.sql.ResultSet).

 try (Statement stmt = con.createStatement()) {

      ResultSet rs = stmt.executeQuery(query);

      while (rs.next()) {
        String coffeeName = rs.getString("COF_NAME");
        int supplierID = rs.getInt("SUP_ID");
        float price = rs.getFloat("PRICE");
        int sales = rs.getInt("SALES");
        int total = rs.getInt("TOTAL");
        System.out.println(coffeeName + ", " + supplierID + ", " + price +
                           ", " + sales + ", " + total);
      }

    } catch (SQLException e) {
      JDBCTutorialUtilities.printSQLException(e);
    }

try (Connection con = ...) {
    try (Statement proc = con.prepareCall("{ call xxxx())}")) {
        try (ResultSet rs = proc.executeQuery(...)) {
             ...
        }
    }
} catch (SQLException ex) {
    // ERROR
}

 try (
          Connection con = DriverManager.getConnection(getBase, getBase_login, getBase_password);
          CallableStatement  proc = con.prepareCall("{ call xxxx())}");
)
{
            rs = proc.executeQuery();
            rs.next;
          ..........
        } catch (SQLException ex) {
            Logger.getLogger(Server.class.getName()).log(Level.SEVERE, null, ex);
        }