Clean up ProgrammingLanguage code

src/main/java/app/model/ProgrammingLanguage.java

@@ -5,22 +5,21 @@ import java.util.regex.Pattern;
 
 /**
  * An interface describing functions required for a class to
- * provide language specific details and functionality to the 
- * editor
+ * provide language specific details and functionality.
  */
 public interface ProgrammingLanguage {
   /**
-   * The name of the programming language
+   * @return The name of the programming language
    */
   public String getName();
   
   /**
-   * The map containing the regex and corresponding style-classes to be used for syntax highlighting
+   * @return The map containing the regexes and corresponding style-classes to be used for syntax highlighting
    */
   public Map<Pattern,String> getPatternMap();
 
   /**
-   * The pattern containing all regexes for syntax highlighting
+   * @return A combined regex for syntax highlighting
    */
   public Pattern getPattern();
 
@@ -39,8 +38,8 @@ public interface ProgrammingLanguage {
   public String unCommentLine(String line);
 
   /**
-   * Whether or not a line is commented
    * @param line The text of the line
+   * @return Whether or not a line is commented
    */
   public boolean isCommentedLine(String line);
 
@@ -52,15 +51,15 @@ public interface ProgrammingLanguage {
   public String commentSelection(String selection);
 
   /**
-   * Uncomment a line
-   * @param selection The text of the line to uncomment
+   * Uncomment an area of text
+   * @param selection The text of the area to uncomment
    * @return The uncommented area
    */
   public String unCommentSelection(String selection);
 
   /**
-   * Whether or not an area of text is commented
    * @param selection The content of the area
+   * @return Whether or not an area of text is commented
    */
   public boolean isCommentedSelection(String selection);
 

src/main/java/app/model/languages/Java.java

@@ -15,6 +15,7 @@ import app.model.ProgrammingLanguage;
 public class Java implements ProgrammingLanguage {
 
   private String name = "Java";
+  private static Map<Pattern, String> pattern;
 
   private static final String[] keywords = new String[] {
     "abstract", "assert", "boolean", "break", "byte",
@@ -52,9 +53,11 @@ public class Java implements ProgrammingLanguage {
       e("(?://.*)|/\\*(?:\\n|.)*?\\*/", "comment")
     );
   
-  private static Map<Pattern, String> pattern;
-
   public Java() {
+    this.initializePatternMap();
+  }
+
+  private void initializePatternMap() {
     pattern = new LinkedHashMap<>();
     patternList
       .forEach(e -> pattern.put(e.getKey(), e.getValue()));

src/main/java/app/model/languages/Markdown.java

@@ -14,6 +14,7 @@ import app.model.ProgrammingLanguage;
 public class Markdown implements ProgrammingLanguage {
 
   private String name = "Markdown";
+  private static Map<Pattern, String> pattern;
 
   private static Entry<Pattern, String> e(String k, String v) {
     return new AbstractMap.SimpleEntry<>(Pattern.compile(k), v);
@@ -38,9 +39,12 @@ public class Markdown implements ProgrammingLanguage {
       e("\\[\\d+\\]: .*", "source")
     );
 
-  private static Map<Pattern, String> pattern;
 
   public Markdown() {
+    this.initializePatternMap();
+  }
+
+  private void initializePatternMap() {
     pattern = new LinkedHashMap<>();
     patternList
       .forEach(e -> pattern.put(e.getKey(), e.getValue()));