Use basic type (#13016)

Author: koppor

jablib/src/main/java/org/jabref/logic/bibtex/BibEntryWriter.java

@@ -66,7 +66,7 @@ public void write(BibEntry entry, BibWriter out, BibDatabaseMode bibDatabaseMode
      * @param bibDatabaseMode The database mode (bibtex or biblatex)
      * @param reformat        Should the entry be in any case, even if no change occurred?
      */
-    public void write(BibEntry entry, BibWriter out, BibDatabaseMode bibDatabaseMode, Boolean reformat) throws IOException {
+    public void write(BibEntry entry, BibWriter out, BibDatabaseMode bibDatabaseMode, boolean reformat) throws IOException {
         // if the entry has not been modified, write it as it was
         if (!reformat && !entry.hasChanged()) {
             out.write(entry.getParsedSerialization());