Added JavaDocs

Added JavaDocs to various files, namely License, Media, PageTitle, and Utils.

app/src/main/java/fr/free/nrw/commons/License.java

@@ -8,6 +8,16 @@ public class License {
     private String url;
     private String name;
 
+    /**
+     * Constructs a new instance of License.
+     *
+     * @param key       license key
+     * @param template  license template
+     * @param url       license URL
+     * @param name      licence name
+     *
+     * @throws RuntimeException if License.key or Licence.template is null
+     */
     public License(String key, String template, String url, String name) {
         if (key == null) {
             throw new RuntimeException("License.key must not be null");
@@ -21,10 +31,18 @@ public class License {
         this.name = name;
     }
 
+    /**
+     * Gets the license key.
+     * @return license key as a String.
+     */
     public String getKey() {
         return key;
     }
 
+    /**
+     * Gets the license template.
+     * @return license template as a String.
+     */
     public String getTemplate() {
         return template;
     }

app/src/main/java/fr/free/nrw/commons/Media.java

@@ -128,89 +128,179 @@ public class Media implements Parcelable {
         return imageUrl;
     }
 
+    /**
+     * Gets the name of the file.
+     * @return file name as a string
+     */
     public String getFilename() {
         return filename;
     }
 
+    /**
+     * Sets the name of the file.
+     * @param filename the new name of the file
+     */
     public void setFilename(String filename) {
         this.filename = filename;
     }
 
+    /**
+     * Gets the file description.
+     * @return file description as a string
+     */
     public String getDescription() {
         return description;
     }
 
+    /**
+     * Sets the file description.
+     * @param description the new description of the file
+     */
     public void setDescription(String description) {
         this.description = description;
     }
 
+    /**
+     * Gets the datalength of the file.
+     * @return file datalength as a long
+     */
     public long getDataLength() {
         return dataLength;
     }
 
+    /**
+     * Sets the datalength of the file.
+     * @param dataLength as a long
+     */
     public void setDataLength(long dataLength) {
         this.dataLength = dataLength;
     }
 
+    /**
+     * Gets the creation date of the file.
+     * @return creation date as a Date
+     */
     public Date getDateCreated() {
         return dateCreated;
     }
 
+    /**
+     * Sets the creation date of the file.
+     * @param date creation date as a Date
+     */
     public void setDateCreated(Date date) {
         this.dateCreated = date;
     }
 
+    /**
+     * Gets the upload date of the file.
+     * Can be null.
+     * @return upload date as a Date
+     */
     public @Nullable
     Date getDateUploaded() {
         return dateUploaded;
     }
 
+    /**
+     * Gets the name of the creator of the file.
+     * @return creator name as a String
+     */
     public String getCreator() {
         return creator;
     }
 
+    /**
+     * Sets the creator name of the file.
+     * @param creator creator name as a string
+     */
     public void setCreator(String creator) {
         this.creator = creator;
     }
 
+    /**
+     * Gets the width of the media.
+     * @return file width as an int
+     */
     public int getWidth() {
         return width;
     }
 
+    /**
+     * Sets the width of the media.
+     * @param width file width as an int
+     */
     public void setWidth(int width) {
         this.width = width;
     }
 
+    /**
+     * Gets the height of the media.
+     * @return file height as an int
+     */
     public int getHeight() {
         return height;
     }
 
+    /**
+     * Sets the height of the media.
+     * @param height file height as an int
+     */
     public void setHeight(int height) {
         this.height = height;
     }
 
+    /**
+     * Gets the license name of the file.
+     * @return license as a String
+     */
     public String getLicense() {
         return license;
     }
 
+    /**
+     * Sets the license name of the file.
+     * @param license license name as a String
+     */
     public void setLicense(String license) {
         this.license = license;
     }
 
+    /**
+     * Gets the coordinates of the file.
+     * </p>
+     * Presumably indicates upload location.
+     * @return file coordinates as a LatLng
+     */
     public @Nullable
     LatLng getCoordinates() {
         return coordinates;
     }
 
+    /**
+     * Sets the coordinates of the file.
+     * @param coordinates file coordinates as a LatLng
+     */
     public void setCoordinates(@Nullable LatLng coordinates) {
         this.coordinates = coordinates;
     }
 
+    /**
+     * Gets the categories the file falls under.
+     * @return file categories as an ArrayList of Strings
+     */
     @SuppressWarnings("unchecked")
     public ArrayList<String> getCategories() {
         return (ArrayList<String>) categories.clone(); // feels dirty
     }
 
+    /**
+     * Sets the categories the file falls under.
+     * </p>
+     * Does not append: i.e. will clear the current categories
+     * and then add the specified ones.
+     * @param categories file categories as a list of Strings
+     */
     public void setCategories(List<String> categories) {
         this.categories.clear();
         this.categories.addAll(categories);

app/src/main/java/fr/free/nrw/commons/PageTitle.java

@@ -84,6 +84,12 @@ public class PageTitle {
         return titleKey;
     }
 
+    /**
+     * Gets the canonicalized title for displaying (such as "File:My example.jpg").
+     * </p>
+     * Essentially equivalent to getPrefixedText
+     * @return canonical title as a String
+     */
     @Override
     public String toString() {
         return getPrefixedText();

app/src/main/java/fr/free/nrw/commons/Utils.java

@@ -51,6 +51,12 @@ public class Utils {
         }
     }
 
+    /**
+     * Capitalizes the first character of a string.
+     *
+     * @param string
+     * @return string with capitalized first character
+     */
     public static String capitalize(String string) {
         return string.substring(0, 1).toUpperCase(Locale.getDefault()) + string.substring(1);
     }