Erro pra recuperar xml, ajuda ai!

[Fatal Error] :1:9: XML document structures must start and end within the same entity.

Exception inidentar texto pre-formatado em 4 espaços thread “main” com.thoughtworks.xstream.io.StreamException:  : XML document structures must start and end within the same entity.

at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:105)

at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:77)

at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1040)

at persistencia.PersistenciaXML.carregarXml(PersistenciaXML.java:62)

at MainTest.main(MainTest.java:14)

Caused by: org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 9; XML document structures must start and end within the same entity.

at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:257)

at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)

at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:98)

… 4 more