Update try catch to use try with resources

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/dao/impl/DeviceTypeDAOImpl.java

@@ -431,23 +431,21 @@ public class DeviceTypeDAOImpl implements DeviceTypeDAO {
 	@Override
 	public void deleteDeviceType(int tenantID, int deviceTypeId) throws DeviceManagementDAOException {
 		Connection conn;
-		PreparedStatement stmt = null;
-		try {
-			conn = getConnection();
 		String sql = "DELETE FROM DM_DEVICE_TYPE" +
 		             " WHERE" +
 		             " ID = ?" +
 		             " AND PROVIDER_TENANT_ID = ?";
-			stmt = conn.prepareStatement(sql);
+		try {
+			conn = getConnection();
+			try (PreparedStatement stmt = conn.prepareStatement(sql)) {
 				stmt.setInt(1, deviceTypeId);
 				stmt.setInt(2, tenantID);
 				stmt.execute();
+			}
 		} catch (SQLException e) {
 			throw new DeviceManagementDAOException(
 					"Error occurred while deleting device type of id: " + deviceTypeId +
 					" for tenant: " + tenantID, e);
-		} finally {
-			DeviceManagementDAOUtil.cleanupResources(stmt, null);
 		}
 	}