JavaDoc for Container classes

Removed unused ones

APP/app/src/main/java/javinator9889/securepass/objects/SingletonFutureContainer.java

@@ -3,6 +3,7 @@
 import java.util.concurrent.Future;
 
 /**
+ * Class for containing <code>Future</code> objects that will be used on each app first start
  * Created by Javinator9889 on 03/10/2018.
  */
 public class SingletonFutureContainer {
@@ -11,33 +12,87 @@ public class SingletonFutureContainer {
     private Future<CharSequence> mLicenseText;
     private Future<CharSequence> mToSText;
 
+    /**
+     * Default synchronized constructor which returns a generated instance (or a new one)
+     *
+     * @return {@link #INSTANCE} if existing, else new one
+     */
     public static synchronized SingletonFutureContainer getInstance() {
         if (INSTANCE == null)
             INSTANCE = new SingletonFutureContainer();
         return INSTANCE;
     }
 
+    /**
+     * Obtains the privacy text stored
+     *
+     * @return <code>Future</code> with the text
+     * @throws NullPointerException when there is no text stored
+     */
     public Future<CharSequence> getPrivacyText() {
+        if (mPrivacyText == null)
+            throw new NullPointerException("There is no privacy text future object stored");
         return mPrivacyText;
     }
 
+    /**
+     * Sets the privacy text future object
+     *
+     * @param privacyText future text to store
+     * @throws NullPointerException when the <code>privacyText</code> is <code>null</code>
+     */
     public void setPrivacyText(Future<CharSequence> privacyText) {
+        if (privacyText == null)
+            throw new NullPointerException("privacyText is null");
         this.mPrivacyText = privacyText;
     }
 
+    /**
+     * Obtains the license text stored
+     *
+     * @return <code>Future</code> with the text
+     * @throws NullPointerException when there is no text stored
+     */
     public Future<CharSequence> getLicenseText() {
+        if (mPrivacyText == null)
+            throw new NullPointerException("There is no license text future object stored");
         return mLicenseText;
     }
 
+    /**
+     * Sets the license text future object
+     *
+     * @param licenseText future text to store
+     * @throws NullPointerException when the <code>licenseText</code> is <code>null</code>
+     */
     public void setLicenseText(Future<CharSequence> licenseText) {
+        if (licenseText == null)
+            throw new NullPointerException("licenseText is null");
         this.mLicenseText = licenseText;
     }
 
+    /**
+     * Obtains the terms of service text stored
+     *
+     * @return <code>Future</code> with the text
+     * @throws NullPointerException when there is no text stored
+     */
     public Future<CharSequence> getToSText() {
+        if (mPrivacyText == null)
+            throw new NullPointerException("There is no terms of service text future object " +
+                    "stored");
         return mToSText;
     }
 
+    /**
+     * Sets the license text future object
+     *
+     * @param toSText future text to store
+     * @throws NullPointerException when the <code>toSText</code> is <code>null</code>
+     */
     public void setToSText(Future<CharSequence> toSText) {
+        if (toSText == null)
+            throw new NullPointerException("toSText is null");
         this.mToSText = toSText;
     }
 }

APP/app/src/main/java/javinator9889/securepass/objects/SlidesTypefacesContainer.java

@@ -3,6 +3,8 @@
 import androidx.annotation.FontRes;
 
 /**
+ * Class for containing <code>Typeface</code> for
+ * {@link com.github.paolorotolo.appintro.model.SliderPage}
  * Created by Javinator9889 on 12/10/2018.
  */
 public class SlidesTypefacesContainer {
@@ -11,16 +13,35 @@ public class SlidesTypefacesContainer {
     private @FontRes
     int mDescriptionTypeface;
 
+    /**
+     * Public available constructor for saving the <code>Typeface</code>s
+     *
+     * @param titleTypeface       title custom typeface (must be a @FontRes)
+     * @param descriptionTypeface description custom typeface (must be a @FontRes)
+     * @see FontRes
+     */
     public SlidesTypefacesContainer(@FontRes int titleTypeface, @FontRes int descriptionTypeface) {
         this.mTitleTypeface = titleTypeface;
         this.mDescriptionTypeface = descriptionTypeface;
     }
 
+    /**
+     * Obtains the stored title <code>Typeface</code>
+     *
+     * @return <code>int</code> with the @FontRes typeface
+     * @see FontRes
+     */
     @FontRes
     public int getTitleTypeface() {
         return mTitleTypeface;
     }
 
+    /**
+     * Obtains the stored description <code>Typeface</code>
+     *
+     * @return <code>int</code> with the @FontRes typeface
+     * @see FontRes
+     */
     @FontRes
     public int getDescriptionTypeface() {
         return mDescriptionTypeface;