From e3ac92367c0fde656598f388e9026f45c2868c4b Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Wed, 25 Apr 2012 16:35:59 +0200
Subject: [PATCH] Add javadoc.

---
 .../pterodactylus/demoscenemusic/data/Artist.java  |  38 ++++-
 .../pterodactylus/demoscenemusic/data/Base.java    |   8 +-
 .../demoscenemusic/data/DataManager.java           | 170 ++++++++++++++++++++-
 .../demoscenemusic/data/DefaultArtist.java         |  24 ++-
 .../demoscenemusic/data/DefaultBase.java           |  87 ++++++++++-
 .../demoscenemusic/data/DefaultGroup.java          |  12 +-
 .../demoscenemusic/data/DefaultParty.java          |  18 ++-
 .../demoscenemusic/data/DefaultStyle.java          |  18 ++-
 .../demoscenemusic/data/DefaultTrack.java          |  30 +++-
 .../pterodactylus/demoscenemusic/data/Group.java   |  38 ++++-
 .../pterodactylus/demoscenemusic/data/Party.java   |  15 +-
 .../pterodactylus/demoscenemusic/data/Style.java   |  14 +-
 .../pterodactylus/demoscenemusic/data/Track.java   |  38 ++++-
 13 files changed, 495 insertions(+), 15 deletions(-)

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Artist.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Artist.java
index d9e6682..563a3bc 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Artist.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Artist.java
@@ -20,22 +20,58 @@ package net.pterodactylus.demoscenemusic.data;
 import java.util.Collection;
 
 /**
- * TODO
+ * Data interface for artists.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Artist extends Base {
 
+	/**
+	 * Returns the name of this artist.
+	 *
+	 * @return The name of this artist
+	 */
 	public String getName();
 
+	/**
+	 * Sets the name of this artist.
+	 *
+	 * @param name
+	 *            The new name of this artist
+	 * @return This artist
+	 */
 	public Artist setName(String name);
 
+	/**
+	 * Returns the groups this artist belongs to.
+	 *
+	 * @return The groups this artist belongs to
+	 */
 	public Collection<Group> getGroups();
 
+	/**
+	 * Sets the groups this artist belongs to.
+	 *
+	 * @param groups
+	 *            The groups this artist belongs to
+	 * @return This artist
+	 */
 	public Artist setGroups(Collection<Group> groups);
 
+	/**
+	 * Returns the tracks created by this artist.
+	 *
+	 * @return The tracks created by this artist
+	 */
 	public Collection<Track> getTracks();
 
+	/**
+	 * Sets the tracks created by this artist.
+	 *
+	 * @param tracks
+	 *            The tracks created by this artist
+	 * @return This artist
+	 */
 	public Artist setTracks(Collection<Track> tracks);
 
 }
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Base.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Base.java
index 921ca30..e187041 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Base.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Base.java
@@ -17,14 +17,18 @@
 
 package net.pterodactylus.demoscenemusic.data;
 
-
 /**
- * TODO
+ * Base class for all data interfaces and implementations.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Base {
 
+	/**
+	 * Returns the ID of the data container.
+	 *
+	 * @return The ID of the data container
+	 */
 	public String getId();
 
 }
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index b2a3337..f3252f0 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -38,33 +38,64 @@ import net.pterodactylus.util.database.ValueField;
 import net.pterodactylus.util.database.ValueFieldWhereClause;
 
 /**
- * TODO
+ * Interface between the database and the application.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DataManager {
 
+	/** The artist object creator. */
 	@SuppressWarnings("synthetic-access")
 	private final ObjectCreator<Artist> artistCreator = new ArtistCreator();
+
+	/** The group object creator. */
 	@SuppressWarnings("synthetic-access")
 	private final ObjectCreator<Group> groupCreator = new GroupCreator();
+
+	/** The track object creator. */
 	@SuppressWarnings("synthetic-access")
 	private final ObjectCreator<Track> trackCreator = new TrackCreator();
+
+	/** The style object creator. */
 	@SuppressWarnings("synthetic-access")
 	private final ObjectCreator<Style> styleCreator = new StyleCreator();
 
+	/** The database. */
 	private final Database database;
 
+	/**
+	 * Creates a new data manager.
+	 *
+	 * @param database
+	 *            The database to operate on
+	 */
 	public DataManager(Database database) {
 		this.database = database;
 	}
 
+	/**
+	 * Returns all artists.
+	 *
+	 * @return All artists
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Collection<Artist> getAllArtists() throws DatabaseException {
 		Query query = new Query(Type.SELECT, "ARTISTS");
 		query.addField(new Field("ARTISTS.*"));
 		return database.getMultiple(query, artistCreator);
 	}
 
+	/**
+	 * Returns the artist with the given ID.
+	 *
+	 * @param id
+	 *            The ID of the artist
+	 * @return The artist with the given ID, or {@code null} if there is no
+	 *         artist with the given ID
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Artist getArtistById(String id) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "ARTISTS");
 		query.addField(new Field("ARTISTS.*"));
@@ -72,6 +103,15 @@ public class DataManager {
 		return database.getSingle(query, artistCreator);
 	}
 
+	/**
+	 * Returns all artists that belong to the group with the given ID.
+	 *
+	 * @param groupId
+	 *            The ID of the group
+	 * @return All artists belonging to the given group
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Collection<Artist> getArtistsByGroup(String groupId) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "ARTISTS");
 		query.addField(new Field("ARTISTS.*"));
@@ -80,6 +120,15 @@ public class DataManager {
 		return database.getMultiple(query, artistCreator);
 	}
 
+	/**
+	 * Returns all artists involved in the track with the given ID.
+	 *
+	 * @param trackId
+	 *            The ID of the track
+	 * @return All artists involved in the track, in preferred order
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public List<Artist> getArtistsByTrack(String trackId) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "ARTISTS");
 		query.addField(new Field("ARTISTS.*"));
@@ -89,6 +138,16 @@ public class DataManager {
 		return database.getMultiple(query, artistCreator);
 	}
 
+	/**
+	 * Returns the track with the given ID.
+	 *
+	 * @param id
+	 *            The ID of the track
+	 * @return The track with the given ID, or {@code null} if there is no such
+	 *         track
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Track getTrackById(String id) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "TRACKS");
 		query.addField(new Field("TRACKS.*"));
@@ -96,6 +155,15 @@ public class DataManager {
 		return database.getSingle(query, trackCreator);
 	}
 
+	/**
+	 * Returns all tracks by the artist with the given ID.
+	 *
+	 * @param artistId
+	 *            The ID of the artist
+	 * @return All tracks by the given artist
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Collection<Track> getTracksByArtist(String artistId) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "TRACKS");
 		query.addField(new Field("TRACKS.*"));
@@ -104,6 +172,15 @@ public class DataManager {
 		return database.getMultiple(query, trackCreator);
 	}
 
+	/**
+	 * Returns all groups the artist with the given ID belongs to.
+	 *
+	 * @param artistId
+	 *            The ID of the artist
+	 * @return All groups the artist belongs to
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Collection<Group> getGroupsByArtist(String artistId) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "GROUPS");
 		query.addField(new Field("GROUPS.*"));
@@ -112,6 +189,15 @@ public class DataManager {
 		return database.getMultiple(query, groupCreator);
 	}
 
+	/**
+	 * Returns all styles for the track with the given ID.
+	 *
+	 * @param trackId
+	 *            The ID of the track
+	 * @return All styles for the given track
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
 	public Collection<Style> getStylesByTrack(String trackId) throws DatabaseException {
 		Query query = new Query(Type.SELECT, "STYLES");
 		query.addField(new Field("STYLES.*"));
@@ -120,8 +206,16 @@ public class DataManager {
 		return database.getMultiple(query, styleCreator);
 	}
 
+	/**
+	 * {@link Artist} implementation that retrieves some attributes (such as
+	 * {@link #getGroups()}, and {@link #getTracks()}) from the
+	 * {@link DataManager} on demand.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class LazyArtist extends DefaultArtist {
 
+		/** Memoizer for the tracks by this artist. */
 		private final Memoizer<Void> tracksMemoizer = new Memoizer<Void>(new Callable<Void>() {
 			@Override
 			public Void call() throws DatabaseException {
@@ -132,6 +226,7 @@ public class DataManager {
 			}
 		});
 
+		/** Memoizer for the groups of this artist. */
 		private final Memoizer<Void> groupsMemoizer = new Memoizer<Void>(new Callable<Void>() {
 
 			@Override
@@ -144,10 +239,20 @@ public class DataManager {
 
 		});
 
+		/**
+		 * Creates a new lazy artist.
+		 *
+		 * @param id
+		 *            The ID of the artist
+		 */
 		public LazyArtist(String id) {
 			super(id);
 		}
 
+		//
+		// DEFAULTARTIST METHODS
+		//
+
 		/**
 		 * {@inheritDoc}
 		 */
@@ -157,6 +262,9 @@ public class DataManager {
 			return super.getGroups();
 		}
 
+		/**
+		 * {@inheritDoc}
+		 */
 		@Override
 		public Collection<Track> getTracks() {
 			tracksMemoizer.get();
@@ -165,6 +273,13 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link ObjectCreator} implementation that can create {@link Artist}
+	 * objects. This specific class actually creates {@link LazyArtist}
+	 * instances.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class ArtistCreator implements ObjectCreator<Artist> {
 
 		/**
@@ -177,8 +292,15 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link Group} implementation that retrieves some attributes (such as
+	 * {@link #getArtists()}) from the {@link DataManager} on demand.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class LazyGroup extends DefaultGroup {
 
+		/** Memoizer for the artist. */
 		private final Memoizer<Void> artistsMemoizer = new Memoizer<Void>(new Callable<Void>() {
 
 			@Override
@@ -191,10 +313,20 @@ public class DataManager {
 
 		});
 
+		/**
+		 * Creates a new lazy group.
+		 *
+		 * @param id
+		 *            The ID of the group
+		 */
 		public LazyGroup(String id) {
 			super(id);
 		}
 
+		//
+		// DEFAULTGROUP METHODS
+		//
+
 		/**
 		 * {@inheritDoc}
 		 */
@@ -206,6 +338,13 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link ObjectCreator} implementation that can create {@link Group}
+	 * objects. This specific implementation creates {@link LazyGroup}
+	 * instances.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class GroupCreator implements ObjectCreator<Group> {
 
 		/**
@@ -218,8 +357,16 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link Track} implementation that retrieves some attributes (such as
+	 * {@link #getArtists()}, and {@link #getStyles()}) from the
+	 * {@link DataManager} on demand.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class LazyTrack extends DefaultTrack {
 
+		/** Memoizer for the artists. */
 		private final Memoizer<Void> artistsMemoizer = new Memoizer<Void>(new Callable<Void>() {
 
 			@Override
@@ -232,6 +379,7 @@ public class DataManager {
 
 		});
 
+		/** Memoizer for the styles. */
 		private final Memoizer<Void> stylesMemoizer = new Memoizer<Void>(new Callable<Void>() {
 
 			@Override
@@ -245,12 +393,19 @@ public class DataManager {
 		});
 
 		/**
+		 * Creates a new track.
+		 *
 		 * @param id
+		 *            The ID of the track
 		 */
 		public LazyTrack(String id) {
 			super(id);
 		}
 
+		//
+		// DEFAULTTRACK METHODS
+		//
+
 		/**
 		 * {@inheritDoc}
 		 */
@@ -271,6 +426,13 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link ObjectCreator} implementation that can create {@link Track}
+	 * objects. This specific implementation creates {@link LazyTrack}
+	 * instances.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class TrackCreator implements ObjectCreator<Track> {
 
 		/**
@@ -283,6 +445,12 @@ public class DataManager {
 
 	}
 
+	/**
+	 * {@link ObjectCreator} implementation that can create {@link Style}
+	 * objects.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	private class StyleCreator implements ObjectCreator<Style> {
 
 		/**
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultArtist.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultArtist.java
index 26a06bb..7f99a9c 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultArtist.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultArtist.java
@@ -20,21 +20,37 @@ package net.pterodactylus.demoscenemusic.data;
 import java.util.Collection;
 
 /**
- * TODO
+ * Default implementation for an artist data container.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultArtist extends DefaultBase implements Artist {
 
+	/**
+	 * Creates a new artist data container.
+	 *
+	 * @param id
+	 *            The ID of the artist
+	 */
 	public DefaultArtist(String id) {
 		super(id);
 	}
 
+	//
+	// ARTIST METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public String getName() {
 		return getValue("name", String.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Artist setName(String name) {
 		getValue("name", String.class).set(name);
@@ -59,12 +75,18 @@ public class DefaultArtist extends DefaultBase implements Artist {
 		return this;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	@SuppressWarnings({ "unchecked" })
 	public Collection<Track> getTracks() {
 		return getValue("tracks", Collection.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Artist setTracks(Collection<Track> tracks) {
 		getValue("tracks", Collection.class).set(tracks);
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultBase.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultBase.java
index a75563b..345ebd2 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultBase.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultBase.java
@@ -22,29 +22,66 @@ import java.util.Map;
 import java.util.Map.Entry;
 
 /**
- * TODO
+ * Base implementation of a data container. It stores the ID of a container and
+ * can contain arbitrary attributes.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultBase implements Base {
 
+	/** The ID of the data container. */
 	private final String id;
 
+	/** The attributes of the data container. */
 	private final Map<String, Value<?>> attributes = new HashMap<String, Value<?>>();
 
+	/**
+	 * Creates a new data container with the given ID.
+	 *
+	 * @param id
+	 *            The ID of the data container
+	 */
 	protected DefaultBase(String id) {
 		this.id = id;
 	}
 
+	//
+	// ACCESSORS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public String getId() {
 		return id;
 	}
 
+	/**
+	 * Returns whether the data container contains an attribute with the given
+	 * name.
+	 *
+	 * @param name
+	 *            The name of the attribute to check for
+	 * @return {@code true} if this data container contains an attribute with
+	 *         the given name, {@code false} otherwise
+	 */
 	protected boolean hasValue(String name) {
 		return attributes.containsKey(name);
 	}
 
+	/**
+	 * Returns the value of the attribute with the given name. If no value for
+	 * the given attribute exists, one will be created, stored, and returned.
+	 *
+	 * @param <T>
+	 *            The type of the value to return
+	 * @param name
+	 *            The name of the attribute to get
+	 * @param clazz
+	 *            The class of the value
+	 * @return The value of the attribute
+	 */
 	@SuppressWarnings({ "unchecked" })
 	protected <T> Value<T> getValue(String name, Class<T> clazz) {
 		if (!attributes.containsKey(name)) {
@@ -53,6 +90,12 @@ public class DefaultBase implements Base {
 		return (Value<T>) attributes.get(name);
 	}
 
+	/**
+	 * Returns whether any of the attributes of this data container is dirty,
+	 * i.e. it was modified after its initial inception.
+	 *
+	 * @return {@code true} if any attribute of this data container was modified
+	 */
 	protected boolean isDirty() {
 		for (Value<?> value : attributes.values()) {
 			if (value.isDirty()) {
@@ -100,18 +143,46 @@ public class DefaultBase implements Base {
 		return stringBuilder.toString();
 	}
 
+	/**
+	 * Container for an attribute value stored in a data container.
+	 *
+	 * @see DefaultBase#attributes
+	 * @param <T>
+	 *            The type of the value
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
 	protected static class Value<T> {
 
+		/** The original value. */
 		private T original;
 
+		/** Whether the original value has been set. */
 		private boolean originalSet;
 
+		/** The current value. */
 		private T current;
 
+		//
+		// ACCESSORS
+		//
+
+		/**
+		 * Returns the current value.
+		 *
+		 * @return The current value
+		 */
 		public T get() {
 			return current;
 		}
 
+		/**
+		 * Sets the current value. If no original value has yet been set, the
+		 * given value is also stored as original value.
+		 *
+		 * @param value
+		 *            The value to set
+		 * @return This value
+		 */
 		public Value<T> set(T value) {
 			if (!originalSet) {
 				original = value;
@@ -121,10 +192,24 @@ public class DefaultBase implements Base {
 			return this;
 		}
 
+		/**
+		 * Returns whether the value of this value does not equal its original
+		 * value.
+		 *
+		 * @return {@code true} if the current value is not equal to the
+		 *         original value, {@code false} if it is equal to the original
+		 *         value
+		 */
 		public boolean isDirty() {
 			return (original != null) ? !original.equals(current) : current != null;
 		}
 
+		/**
+		 * Commits the current value, i.e. sets the original value to the
+		 * current value.
+		 *
+		 * @return This value
+		 */
 		public Value<T> commit() {
 			original = current;
 			return this;
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultGroup.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultGroup.java
index aae28e3..437fadb 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultGroup.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultGroup.java
@@ -20,16 +20,26 @@ package net.pterodactylus.demoscenemusic.data;
 import java.util.Collection;
 
 /**
- * TODO
+ * Default implementation of a group data container.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultGroup extends DefaultBase implements Group {
 
+	/**
+	 * Creates a new group data container.
+	 *
+	 * @param id
+	 *            The ID of the group
+	 */
 	public DefaultGroup(String id) {
 		super(id);
 	}
 
+	//
+	// GROUP METHODS
+	//
+
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultParty.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultParty.java
index f30a42f..993d69a 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultParty.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultParty.java
@@ -18,21 +18,37 @@
 package net.pterodactylus.demoscenemusic.data;
 
 /**
- * TODO
+ * Default implementation of a party data container.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultParty extends DefaultBase implements Party {
 
+	/**
+	 * Creates a new party data container.
+	 *
+	 * @param id
+	 *            The ID of the party
+	 */
 	public DefaultParty(String id) {
 		super(id);
 	}
 
+	//
+	// PARTY METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public String getName() {
 		return getValue("name", String.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public DefaultParty setName(String name) {
 		getValue("name", String.class).set(name);
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultStyle.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultStyle.java
index 19995e2..1b6ae3c 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultStyle.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultStyle.java
@@ -18,21 +18,37 @@
 package net.pterodactylus.demoscenemusic.data;
 
 /**
- * TODO
+ * Default implementation of a style data container.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultStyle extends DefaultBase implements Style {
 
+	/**
+	 * Creates a new style data container.
+	 *
+	 * @param id
+	 *            The ID of the style
+	 */
 	public DefaultStyle(String id) {
 		super(id);
 	}
 
+	//
+	// STYLE METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public String getName() {
 		return getValue("name", String.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Style setName(String name) {
 		getValue("name", String.class).set(name);
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultTrack.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultTrack.java
index de84cdb..b357517 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultTrack.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DefaultTrack.java
@@ -21,45 +21,73 @@ import java.util.Collection;
 import java.util.List;
 
 /**
- * TODO
+ * Default implementation of a track data container.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public class DefaultTrack extends DefaultBase implements Track {
 
+	/**
+	 * Creates a new track data container.
+	 *
+	 * @param id
+	 *            The ID of the track
+	 */
 	public DefaultTrack(String id) {
 		super(id);
 	}
 
+	//
+	// TRACK METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public String getName() {
 		return getValue("name", String.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Track setName(String name) {
 		getValue("name", String.class).set(name);
 		return this;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	@SuppressWarnings("unchecked")
 	public List<Artist> getArtists() {
 		return getValue("artists", List.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Track setArtists(List<Artist> artists) {
 		getValue("artists", List.class).set(artists);
 		return this;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	@SuppressWarnings("unchecked")
 	public Collection<Style> getStyles() {
 		return getValue("styles", Collection.class).get();
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
 	@Override
 	public Track setStyles(Collection<? extends Style> styles) {
 		getValue("styles", Collection.class).set(styles);
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Group.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Group.java
index bba8866..054b303 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Group.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Group.java
@@ -20,22 +20,58 @@ package net.pterodactylus.demoscenemusic.data;
 import java.util.Collection;
 
 /**
- * TODO
+ * Data interface for groups.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Group extends Base {
 
+	/**
+	 * Returns the name of this group.
+	 *
+	 * @return The name of this group
+	 */
 	public String getName();
 
+	/**
+	 * Sets the name of this group.
+	 *
+	 * @param name
+	 *            The name of this group
+	 * @return This group
+	 */
 	public Group setName(String name);
 
+	/**
+	 * Returns the URL of this group’s website.
+	 *
+	 * @return The URL of this group’s website
+	 */
 	public String getUrl();
 
+	/**
+	 * Sets the URL of this group’s website.
+	 *
+	 * @param url
+	 *            The URL of this group’s website
+	 * @return This group
+	 */
 	public Group setUrl(String url);
 
+	/**
+	 * Returns all artists belonging to this group.
+	 *
+	 * @return All artists belonging to this group
+	 */
 	public Collection<Artist> getArtists();
 
+	/**
+	 * Sets all artists belonging to this group.
+	 *
+	 * @param artists
+	 *            All artists belonging to this group
+	 * @return This group
+	 */
 	public Group setArtists(Collection<Artist> artists);
 
 }
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Party.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Party.java
index 4e2e93b..8ce4bcc 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Party.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Party.java
@@ -17,16 +17,27 @@
 
 package net.pterodactylus.demoscenemusic.data;
 
-
 /**
- * TODO
+ * Data interface for parties.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Party extends Base {
 
+	/**
+	 * Returns the name of this party.
+	 *
+	 * @return The name of this party
+	 */
 	public String getName();
 
+	/**
+	 * Sets the name of this party.
+	 *
+	 * @param name
+	 *            The name of this party
+	 * @return This party
+	 */
 	public Party setName(String name);
 
 }
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Style.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Style.java
index 6f572eb..3a2926d 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Style.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Style.java
@@ -18,14 +18,26 @@
 package net.pterodactylus.demoscenemusic.data;
 
 /**
- * TODO
+ * Data interface for styles.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Style extends Base {
 
+	/**
+	 * Returns the name of this style.
+	 *
+	 * @return The name of this style
+	 */
 	public String getName();
 
+	/**
+	 * Sets the name of this style.
+	 *
+	 * @param name
+	 *            The name of this style
+	 * @return This style
+	 */
 	public Style setName(String name);
 
 }
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/Track.java b/src/main/java/net/pterodactylus/demoscenemusic/data/Track.java
index ace6bd3..204cb77 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/Track.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/Track.java
@@ -21,22 +21,58 @@ import java.util.Collection;
 import java.util.List;
 
 /**
- * TODO
+ * Data interface for tracks.
  *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
 public interface Track extends Base {
 
+	/**
+	 * Returns the name of this track.
+	 *
+	 * @return The name of this track
+	 */
 	public String getName();
 
+	/**
+	 * Sets the name of this track.
+	 *
+	 * @param name
+	 *            The name of this track
+	 * @return This track
+	 */
 	public Track setName(String name);
 
+	/**
+	 * Returns all artists involved in this track.
+	 *
+	 * @return All involved artists in preferred order
+	 */
 	public List<Artist> getArtists();
 
+	/**
+	 * Sets all artists involved in this track.
+	 *
+	 * @param artists
+	 *            All involved artists in preferred order
+	 * @return This track
+	 */
 	public Track setArtists(List<Artist> artists);
 
+	/**
+	 * Returns all styles of this track.
+	 *
+	 * @return All styles of this track
+	 */
 	public Collection<Style> getStyles();
 
+	/**
+	 * Sets all styles of this track.
+	 *
+	 * @param styles
+	 *            All styles of this track
+	 * @return This track
+	 */
 	public Track setStyles(Collection<? extends Style> styles);
 
 }
-- 
2.7.4