Added toString() to a Breakpoint for debugging debugger

Change-Id: I13f3064cd851efb05acd7435af03ce63f6d84661
Signed-off-by: Andrey Loskutov <loskutov@gmx.de>
diff --git a/org.eclipse.debug.core/core/org/eclipse/debug/core/model/Breakpoint.java b/org.eclipse.debug.core/core/org/eclipse/debug/core/model/Breakpoint.java
index 62abed7..b439045 100644
--- a/org.eclipse.debug.core/core/org/eclipse/debug/core/model/Breakpoint.java
+++ b/org.eclipse.debug.core/core/org/eclipse/debug/core/model/Breakpoint.java
@@ -390,4 +390,16 @@
     	}
     }
 
+	@Override
+	public String toString() {
+		StringBuilder builder = new StringBuilder(getClass().getSimpleName());
+		builder.append(" on ["); //$NON-NLS-1$
+		if (fMarker != null) {
+			builder.append("marker="); //$NON-NLS-1$
+			builder.append(fMarker);
+		}
+		builder.append("]"); //$NON-NLS-1$
+		return builder.toString();
+	}
+
 }