make logger final

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1760711 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/src/ooxml/java/org/apache/poi/openxml4j/opc/ZipPackage.java b/src/ooxml/java/org/apache/poi/openxml4j/opc/ZipPackage.java
index e2f4c8e7079c9df10a1e567ead8deb9960263011..3872e7381ce986200c5abb9a451a6628273837f0 100644 (file)
--- a/src/ooxml/java/org/apache/poi/openxml4j/opc/ZipPackage.java
+++ b/src/ooxml/java/org/apache/poi/openxml4j/opc/ZipPackage.java
@@ -56,7 +56,7 @@ public final class ZipPackage extends OPCPackage {
     private static final String MIMETYPE = "mimetype";
     private static final String SETTINGS_XML = "settings.xml";
 
-    private static POILogger logger = POILogFactory.getLogger(ZipPackage.class);
+    private static final POILogger logger = POILogFactory.getLogger(ZipPackage.class);
 
     /**
      * Zip archive, as either a file on disk,