Adds missing comments for the converter argument class and adds a shorthand parameter

src/main/java/net/knarcraft/ffmpegconverter/parser/ConverterArgument.java

@@ -1,20 +1,60 @@
 package net.knarcraft.ffmpegconverter.parser;
 
 /**
- * A class representing an argument
+ * A class representing a command argument
  */
 public class ConverterArgument {
+
     private final String name;
+    private final char shorthand;
     private final boolean valueRequired;
     private final ConverterArgumentValue valueType;
 
-    public ConverterArgument(String name, boolean valueRequired, ConverterArgumentValue valueType) {
+    /**
+     * Instantiates a converter argument
+     * @param name <p>The name of the argument which users has to type.</p>
+     * @param shorthand <p>A single character value for using the command.</p>
+     * @param valueRequired <p>Whether the argument must be followed by a valid value.</p>
+     * @param valueType <p>The type of value the argument requires.</p>
+     */
+    public ConverterArgument(String name, char shorthand, boolean valueRequired, ConverterArgumentValue valueType) {
         this.name = name;
+        this.shorthand = shorthand;
         this.valueRequired = valueRequired;
         this.valueType = valueType;
     }
 
-    private boolean testArgumentValue(String value) {
+    /**
+     * Gets the argument name
+     * @return <p>The argument name.</p>
+     */
+    public String getName() {
+        return name;
+    }
+
+    /**
+     * Gets the argument shorthand
+     * @return <p>The argument shorthand</p>
+     */
+    public char getShorthand() {
+        return shorthand;
+    }
+
+    /**
+     * Gets whether the argument requires a value
+     * @return <p>Whether the argument requires a value.</p>
+     */
+    public boolean isValueRequired() {
+        return valueRequired;
+    }
+
+    /**
+     * Tests whether the given value is valid for this converter argument
+     *
+     * @param value <p>The value to test.</p>
+     * @return <p>True if the argument is valid. False otherwise.</p>
+     */
+    public boolean testArgumentValue(String value) {
         if (value.length() == 0) {
             return !valueRequired;
         }
@@ -26,9 +66,9 @@ public class ConverterArgument {
                 String lower = value.toLowerCase();
                 return lower.equals("true") || lower.equals("false");
             case COMMA_SEPARATED_LIST:
-                return !value.contains(" ");
-            case SINGLE_VALUE:
-                return !value.contains(" ");
+                return true;
+            case STRING:
+                return true;
             case INT:
                 int ignored = Integer.parseInt(value);
                 return true;