#fixed code
                                public synchronized void createTableIfMissing() {
        Connection connection;
        PreparedStatement preparedStatement = null;
        ResultSet resultSet = null;

        try {
            connection = this.dbConfig.getConnection();
            preparedStatement = connection.prepareStatement("SELECT name FROM sqlite_master WHERE type='table' AND name='repo';");

            resultSet = preparedStatement.executeQuery();
            String value = Values.EMPTYSTRING;
            while (resultSet.next()) {
                value = resultSet.getString("name");
            }

            if (Singleton.getHelpers().isNullEmptyOrWhitespace(value)) {
                preparedStatement = connection.prepareStatement("CREATE TABLE IF NOT EXISTS \"repo\" (\"name\" VARCHAR PRIMARY KEY  NOT NULL ,\"scm\" VARCHAR,\"url\" VARCHAR,\"username\" VARCHAR,\"password\" VARCHAR, \"source\", \"branch\" VARCHAR, data text);");
                preparedStatement.execute();
            }
        }
        catch (SQLException ex) {
            this.logger.severe(String.format("5ec972ce::error in class %s exception %s searchcode was to create the api key table, so api calls will fail", ex.getClass(), ex.getMessage()));
        }
        finally {
            this.helpers.closeQuietly(resultSet);
            this.helpers.closeQuietly(preparedStatement);
        }
    }
#vulnerable code 
                                public synchronized void createTableIfMissing() {

        Connection connection;
        PreparedStatement preparedStatement = null;
        ResultSet resultSet = null;

        try {
            connection = this.dbConfig.getConnection();
            preparedStatement = connection.prepareStatement("CREATE TABLE IF NOT EXISTS \"repo\" (\"name\" VARCHAR PRIMARY KEY  NOT NULL ,\"scm\" VARCHAR,\"url\" VARCHAR,\"username\" VARCHAR,\"password\" VARCHAR, \"source\", \"branch\" VARCHAR, data text);");
            preparedStatement.execute();
        }
        catch (SQLException ex) {
            this.logger.severe(String.format("5ec972ce::error in class %s exception %s", ex.getClass(), ex.getMessage()));
        }
        finally {
            this.helpers.closeQuietly(resultSet);
            this.helpers.closeQuietly(preparedStatement);
        }
    } 
                            #location 16 
                            #vulnerability type NULL_DEREFERENCE