'Custom exception handler while converting XML to java object using JAXB unmarshaller

Hi I am trying to convert a XML to java object using JAXB marshaller .I am using a custom exception handler because i want to get rid of jaxb converting some special characters such as & to html & . I am using java 8.

Help me suggest how to write a custom exception handler

  <confidentialityCode code="" codeSystem=""/>
  <languageCode code="en-"/>
  <recordTarget>
    <patientRole>
      <id root="" extension=""/>
      <telecom value="" use=""/>
      <providerOrganization>
        <id root="" extension=""/>
        <id root="" extension=""/>
        <name>Something</name>
        <telecom value=""/>
        <addr use="">
        <state></state>
        <city> & </city>
        <postalCode></postalCode>
        <streetAddressLine>2121</streetAddressLine>
        </addr>
      </providerOrganization>
    </patientRole>
  </recordTarget>
</ClinicalDocument>```


Error in converting XML to JAXB object 



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