#fixed code
                                @Override
    public void applyDelegate(TlsConfig config) {
        FileInputStream fis = null;
        config.setWorkflowInput(workflowInput);
        if (workflowInput != null) {
            try {
                fis = new FileInputStream(workflowInput);
                WorkflowTrace workflowTrace = WorkflowTraceSerializer.read(fis);
                config.setWorkflowTrace(workflowTrace);
            } catch (JAXBException | XMLStreamException | IOException ex) {
                throw new ConfigurationException("Could not read WorkflowTrace from " + workflowInput, ex);
            } finally {
                try {
                    fis.close();
                } catch (IOException ex) {
                    throw new ConfigurationException("Could not read WorkflowTrace from " + workflowInput, ex);
                }
            }
        }
    }
#vulnerable code 
                                @Override
    public void applyDelegate(TlsConfig config) {
        FileInputStream fis = null;
        try {
            config.setWorkflowInput(workflowInput);
            if (workflowInput != null) {
                fis = new FileInputStream(workflowInput);
                WorkflowTrace workflowTrace = WorkflowTraceSerializer.read(fis);
                config.setWorkflowTrace(workflowTrace);
            }
        } catch (JAXBException | XMLStreamException | IOException ex) {
            throw new ConfigurationException("Could not read WorkflowTrace from " + workflowInput, ex);
        } finally {
            try {
                fis.close();
            } catch (IOException ex) {
                throw new ConfigurationException("Could not read WorkflowTrace from " + workflowInput, ex);
            }
        }

    } 
                            #location 16 
                            #vulnerability type NULL_DEREFERENCE