[PATCH 3 of 3] Mark constants final

[Wald Commits]

# HG changeset patch
# User Tom Gottfried <tom at intevation.de>
# Date 1515755547 -3600
# Node ID 3ecf1f76b2b891e9d0612982f920170e58b54a13
# Parent  ff27548d078c11333f11c1e09b05fa8e7c4168c4
Mark constants final.

diff -r ff27548d078c -r 3ecf1f76b2b8 backend/src/main/java/org/dive4elements/river/importer/Importer.java
--- a/backend/src/main/java/org/dive4elements/river/importer/Importer.java	Fri Jan 12 12:09:44 2018 +0100
+++ b/backend/src/main/java/org/dive4elements/river/importer/Importer.java	Fri Jan 12 12:12:27 2018 +0100
@@ -36,9 +36,9 @@
 public class Importer
 {
     /** Private log. */
-    private static Logger log = Logger.getLogger(Importer.class);
+    private static final Logger log = Logger.getLogger(Importer.class);
 
-    private static String BWASTR_ID_CSV_FILE = "BWASTR_ID.csv";
+    private static final String BWASTR_ID_CSV_FILE = "BWASTR_ID.csv";
 
     protected List<ImportRiver> rivers;
 
diff -r ff27548d078c -r 3ecf1f76b2b8 backend/src/main/java/org/dive4elements/river/importer/parsers/DA66Parser.java
--- a/backend/src/main/java/org/dive4elements/river/importer/parsers/DA66Parser.java	Fri Jan 12 12:09:44 2018 +0100
+++ b/backend/src/main/java/org/dive4elements/river/importer/parsers/DA66Parser.java	Fri Jan 12 12:12:27 2018 +0100
@@ -38,9 +38,9 @@
     /** Private log. */
     private static Logger log = Logger.getLogger(DA66Parser.class);
 
-    private static String HEAD_HEAD = "00";
-    private static String HEAD_GEOM = "66"; // "Values"
-    private static String HEAD_ENDG = "88"; // Probably never used.
+    private static final String HEAD_HEAD = "00";
+    private static final String HEAD_GEOM = "66"; // "Values"
+    private static final String HEAD_ENDG = "88"; // Probably never used.
 
     /** Regex to match lines of files in da66 format. */
     private static final Pattern LINE_PATTERN =