In the following classes there are 2 methods that handle ZipOutputStream without closing it.

common-app-api/src/main/java/org/openecomp/sdc/common/util/ZipUtil.java

openecomp-be/tools/zusammen-tools/src/main/java/org/openecomp/core/tools/util/ZipUtils.java

Need to surround relevant block of code with "try with resources".