diff --git a/pmd-fortran/src/main/java/net/sourceforge/pmd/cpd/FortranTokenizer.java b/pmd-fortran/src/main/java/net/sourceforge/pmd/cpd/FortranTokenizer.java
index 30d3ba70dd..d5a30f1bb8 100644
--- a/pmd-fortran/src/main/java/net/sourceforge/pmd/cpd/FortranTokenizer.java
+++ b/pmd-fortran/src/main/java/net/sourceforge/pmd/cpd/FortranTokenizer.java
@@ -19,16 +19,16 @@ public class FortranTokenizer extends AbstractTokenizer implements Tokenizer {
     public FortranTokenizer() {
         this.spanMultipleLinesString = false; // No such thing in Fortran !
         // setting markers for "string" in Fortran
-        this.stringToken = new ArrayList<String>();
+        this.stringToken = new ArrayList<>();
         this.stringToken.add("\'");
         // setting markers for 'ignorable character' in Fortran
-        this.ignorableCharacter = new ArrayList<String>();
+        this.ignorableCharacter = new ArrayList<>();
         this.ignorableCharacter.add("(");
         this.ignorableCharacter.add(")");
         this.ignorableCharacter.add(",");
 
         // setting markers for 'ignorable string' in Fortran
-        this.ignorableStmt = new ArrayList<String>();
+        this.ignorableStmt = new ArrayList<>();
         this.ignorableStmt.add("do");
         this.ignorableStmt.add("while");
         this.ignorableStmt.add("end");