Merge pull request #22 from DevFactory/release/utility-classes-should-not-have-public-constructors-fix-1

Code quality fix - Utility classes should not have public constructors.

src/main/java/j2html/TagCreator.java

@@ -6,6 +6,8 @@ import java.util.function.*;
 import java.util.stream.*;
 
 public class TagCreator {
+    
+    private TagCreator() {}
 
     /**
      * Creates a DomContent object containing HTML using a mapping function on a collection

src/main/java/j2html/attributes/Attr.java

@@ -1,6 +1,9 @@
 package j2html.attributes;
 
 public class Attr {
+    
+    private Attr() {}
+    
     public static String HIDDEN = "hidden";
     public static String HIGH = "high";
     public static String HREF = "href";

src/main/java/j2html/utils/CSSMin.java

@@ -59,6 +59,8 @@ import java.util.logging.*;
 import java.util.regex.*;
 
 public class CSSMin {
+    
+    private CSSMin() {}
 
     private static final Logger LOG = Logger.getLogger(CSSMin.class.getName());
 

src/main/java/j2html/utils/JSMin.java

@@ -4,6 +4,8 @@ import com.google.javascript.jscomp.*;
 import com.google.javascript.jscomp.Compiler;
 
 public class JSMin {
+    
+    private JSMin() {}
 
     public static String compressJs(String code, String sourcePath) {
         com.google.javascript.jscomp.Compiler compiler = new Compiler();