Starbucks Buys Stake in German Operations  LOS ANGELES (Reuters) - Starbucks Corp. &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=SBUX.O target=/stocks/quickinfo/fullquote"&gt;SBUX.O&lt;/A&gt; said on  Monday it now owns 100 percent of its German operations after  buying KarstadtQuelle AG's &lt;A HREF="http://www.investor.reuters.com/FullQuote.aspx?ticker=KARG.DE target=/stocks/quickinfo/fullquote"&gt;KARG.DE&lt;/A&gt; majority stake in the two  companies' coffee shop joint venture for an undisclosed amount.