placed code in a folder named "hibsrc" and I got following errors:

Java Model Exception: Java Model Status [hibsrc/org/demo [in demo] is not on its project's build path]
at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:505)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:246)
at org.eclipse.jdt.internal.core.Openable.openAncestors(Openable.java:504)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:240)
at org.eclipse.jdt.internal.core.Openable.openAncestors(Openable.java:504)
at org.eclipse.jdt.internal.core.CompilationUnit.openAncestors(CompilationUnit.java:1170)
at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:240)
at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:518)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:255)
at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:241)
at org.eclipse.jdt.internal.core.JavaElement.getChildren(JavaElement.java:196)
at org.eclipse.jdt.internal.core.JavaElement.getChildrenOfType(JavaElement.java:210)
at org.eclipse.jdt.internal.core.CompilationUnit.getTypes(CompilationUnit.java:920)
at org.jboss.tools.ws.jaxrs.core.internal.metamodel.builder.JavaE