Create PrivateGroupManager Facade and stub implementation

briar-api/src/org/briarproject/api/clients/BaseGroup.java

@@ -0,0 +1,46 @@
+package org.briarproject.api.clients;
+
+import org.briarproject.api.sync.Group;
+import org.briarproject.api.sync.GroupId;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class BaseGroup {
+
+	private final Group group;
+	private final String name;
+	private final byte[] salt;
+
+	public BaseGroup(@NotNull Group group, @NotNull String name, byte[] salt) {
+		this.group = group;
+		this.name = name;
+		this.salt = salt;
+	}
+
+	public GroupId getId() {
+		return group.getId();
+	}
+
+	public Group getGroup() {
+		return group;
+	}
+
+	public String getName() {
+		return name;
+	}
+
+	public byte[] getSalt() {
+		return salt;
+	}
+
+	@Override
+	public int hashCode() {
+		return group.hashCode();
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof BaseGroup &&
+				getGroup().equals(((BaseGroup) o).getGroup());
+	}
+
+}