Address issues found in code review

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

@@ -0,0 +1,29 @@
+package org.briarproject.api.clients;
+
+import org.briarproject.api.nullsafety.NotNullByDefault;
+import org.briarproject.api.sync.Group;
+import org.jetbrains.annotations.NotNull;
+
+import javax.annotation.concurrent.ThreadSafe;
+
+@ThreadSafe
+@NotNullByDefault
+public abstract class NamedGroup extends BaseGroup {
+
+	private final byte[] salt;
+
+	public NamedGroup(@NotNull Group group, @NotNull String name, byte[] salt) {
+		super(group, name);
+		this.salt = salt;
+	}
+
+	public byte[] getSalt() {
+		return salt;
+	}
+
+	@Override
+	public boolean equals(Object o) {
+		return o instanceof NamedGroup && super.equals(o);
+	}
+
+}