compile failed in openshift

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:0.23.1:compile (default-compile) on project org.jboss.tools.openshift.ui: Compilation failure: Compilation failure:
[ERROR] /mnt/hudson_workspace/workspace/jbosstools-openshift_4.3.mars/sources/plugins/org.jboss.tools.openshift.ui/src/org/jboss/tools/openshift/internal/ui/wizard/newapp/TemplateListPage.java:[615]
[ERROR] private IObservableList mutableTargets = new WritableList<>();
[ERROR] ^^^^^^^^^^^^
[ERROR] The type WritableList is not generic; it cannot be parameterized with arguments <>
[ERROR] 1 problem (1 error)