When creating for example a BC using the FUSE Tooling, a number of Maven tasks seem to be executed. Some of these require download from the Internet. The issue that occured for me was that this connection does not seem to use the proxy settings from Eclipse, resulting in a failed build, causing the entire BC creation wizard to fail. When used on a system with direct (i.e. no proxy) connection, everything worked fine.
If you configure Maven to use the HTTP proxy, the FUSE Eclipse Tooling will work as expected. For more information, see the following document: